diff --git a/quickstep/src/com/android/launcher3/hybridhotseat/HotseatEduActivity.java b/quickstep/src/com/android/launcher3/hybridhotseat/HotseatEduActivity.java
index c968de9..3a1a2f7 100644
--- a/quickstep/src/com/android/launcher3/hybridhotseat/HotseatEduActivity.java
+++ b/quickstep/src/com/android/launcher3/hybridhotseat/HotseatEduActivity.java
@@ -29,7 +29,6 @@
  */
 public class HotseatEduActivity extends Activity {
 
-
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -49,7 +48,7 @@
         @Override
         public boolean init(BaseActivity activity, boolean alreadyOnHome) {
             QuickstepLauncher launcher = (QuickstepLauncher) activity;
-            if (launcher != null && launcher.getHotseatPredictionController() != null) {
+            if (launcher != null) {
                 launcher.getHotseatPredictionController().showEdu();
             }
             return false;
diff --git a/quickstep/src/com/android/launcher3/hybridhotseat/HotseatFileLog.java b/quickstep/src/com/android/launcher3/hybridhotseat/HotseatFileLog.java
deleted file mode 100644
index 20e1edc..0000000
--- a/quickstep/src/com/android/launcher3/hybridhotseat/HotseatFileLog.java
+++ /dev/null
@@ -1,128 +0,0 @@
-/*
- * Copyright (C) 2020 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.launcher3.hybridhotseat;
-
-import android.content.Context;
-import android.os.Handler;
-import android.util.Log;
-
-import com.android.launcher3.logging.FileLog;
-import com.android.launcher3.util.Executors;
-import com.android.launcher3.util.MainThreadInitializedObject;
-
-import java.io.File;
-import java.io.FileWriter;
-import java.io.PrintWriter;
-import java.text.DateFormat;
-import java.util.Calendar;
-import java.util.Date;
-
-/**
- * Helper class to allow hot seat file logging
- */
-public class HotseatFileLog {
-
-    public static final int LOG_DAYS = 10;
-    private static final String FILE_NAME_PREFIX = "hotseat-log-";
-    private static final DateFormat DATE_FORMAT =
-            DateFormat.getDateTimeInstance(DateFormat.SHORT, DateFormat.SHORT);
-    public static final MainThreadInitializedObject<HotseatFileLog> INSTANCE =
-            new MainThreadInitializedObject<>(HotseatFileLog::new);
-
-
-    private final Handler mHandler = new Handler(
-            Executors.createAndStartNewLooper("hotseat-logger"));
-    private final File mLogsDir;
-    private PrintWriter mCurrentWriter;
-    private String mFileName;
-
-    private HotseatFileLog(Context context) {
-        mLogsDir = context.getFilesDir();
-    }
-
-    /**
-     * Prints log values to disk
-     */
-    public void log(String tag, String msg) {
-        String out = String.format("%s %s %s", DATE_FORMAT.format(new Date()), tag, msg);
-
-        mHandler.post(() -> {
-            synchronized (this) {
-                PrintWriter writer = getWriter();
-                if (writer != null) {
-                    writer.println(out);
-                }
-            }
-        });
-    }
-
-    private PrintWriter getWriter() {
-        Calendar cal = Calendar.getInstance();
-        String fName = FILE_NAME_PREFIX + (cal.get(Calendar.DAY_OF_YEAR) % 10);
-        if (fName.equals(mFileName)) return mCurrentWriter;
-
-        boolean append = false;
-        File logFile = new File(mLogsDir, fName);
-        if (logFile.exists()) {
-            Calendar modifiedTime = Calendar.getInstance();
-            modifiedTime.setTimeInMillis(logFile.lastModified());
-
-            // If the file was modified more that 36 hours ago, purge the file.
-            // We use instead of 24 to account for day-365 followed by day-1
-            modifiedTime.add(Calendar.HOUR, 36);
-            append = cal.before(modifiedTime);
-        }
-
-
-        if (mCurrentWriter != null) {
-            mCurrentWriter.close();
-        }
-        try {
-            mCurrentWriter = new PrintWriter(new FileWriter(logFile, append));
-            mFileName = fName;
-        } catch (Exception ex) {
-            Log.e("HotseatLogs", "Error writing logs to file", ex);
-            closeWriter();
-        }
-        return mCurrentWriter;
-    }
-
-
-    private synchronized void closeWriter() {
-        mFileName = null;
-        if (mCurrentWriter != null) {
-            mCurrentWriter.close();
-        }
-        mCurrentWriter = null;
-    }
-
-
-    /**
-     * Returns a list of all log files
-     */
-    public synchronized File[] getLogFiles() {
-        File[] files = new File[LOG_DAYS + FileLog.LOG_DAYS];
-        //include file log files here
-        System.arraycopy(FileLog.getLogFiles(), 0, files, 0, FileLog.LOG_DAYS);
-
-        closeWriter();
-        for (int i = 0; i < LOG_DAYS; i++) {
-            files[FileLog.LOG_DAYS + i] = new File(mLogsDir, FILE_NAME_PREFIX + i);
-        }
-        return files;
-    }
-}
diff --git a/quickstep/src/com/android/launcher3/hybridhotseat/HotseatPredictionController.java b/quickstep/src/com/android/launcher3/hybridhotseat/HotseatPredictionController.java
index 88cfacb..5e81fba 100644
--- a/quickstep/src/com/android/launcher3/hybridhotseat/HotseatPredictionController.java
+++ b/quickstep/src/com/android/launcher3/hybridhotseat/HotseatPredictionController.java
@@ -26,7 +26,6 @@
 import android.animation.AnimatorSet;
 import android.animation.ObjectAnimator;
 import android.content.ComponentName;
-import android.os.Process;
 import android.view.HapticFeedbackConstants;
 import android.view.View;
 import android.view.ViewGroup;
@@ -40,7 +39,6 @@
 import com.android.launcher3.InvariantDeviceProfile;
 import com.android.launcher3.LauncherSettings;
 import com.android.launcher3.R;
-import com.android.launcher3.Utilities;
 import com.android.launcher3.anim.AnimationSuccessListener;
 import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.dragndrop.DragController;
@@ -446,16 +444,6 @@
      * Logs rank info based on current list of predicted items
      */
     public void logLaunchedAppRankingInfo(@NonNull ItemInfo itemInfo, InstanceId instanceId) {
-        if (Utilities.IS_DEBUG_DEVICE) {
-            final String pkg = itemInfo.getTargetComponent() != null
-                    ? itemInfo.getTargetComponent().getPackageName() : "unknown";
-            HotseatFileLog.INSTANCE.get(mLauncher).log("UserEvent",
-                    "appLaunch: packageName:" + pkg + ",isWorkApp:" + (itemInfo.user != null
-                            && !Process.myUserHandle().equals(itemInfo.user))
-                            + ",launchLocation:" + itemInfo.container);
-        }
-
-
         ComponentName targetCN = itemInfo.getTargetComponent();
         if (targetCN == null) {
             return;
diff --git a/quickstep/src/com/android/launcher3/uioverrides/PredictedAppIcon.java b/quickstep/src/com/android/launcher3/uioverrides/PredictedAppIcon.java
index 22c4a7e..2d50125 100644
--- a/quickstep/src/com/android/launcher3/uioverrides/PredictedAppIcon.java
+++ b/quickstep/src/com/android/launcher3/uioverrides/PredictedAppIcon.java
@@ -160,7 +160,7 @@
     public boolean performAccessibilityAction(int action, ItemInfo info) {
         QuickstepLauncher launcher = Launcher.cast(Launcher.getLauncher(getContext()));
         if (action == PIN_PREDICTION) {
-            if (launcher == null || launcher.getHotseatPredictionController() == null) {
+            if (launcher == null) {
                 return false;
             }
             HotseatPredictionController controller = launcher.getHotseatPredictionController();
diff --git a/quickstep/src/com/android/launcher3/uioverrides/QuickstepLauncher.java b/quickstep/src/com/android/launcher3/uioverrides/QuickstepLauncher.java
index 9a1e707..6098b52 100644
--- a/quickstep/src/com/android/launcher3/uioverrides/QuickstepLauncher.java
+++ b/quickstep/src/com/android/launcher3/uioverrides/QuickstepLauncher.java
@@ -49,7 +49,6 @@
 import com.android.launcher3.allapps.search.SearchAdapterProvider;
 import com.android.launcher3.anim.AnimatorPlaybackController;
 import com.android.launcher3.appprediction.PredictionRowView;
-import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.hybridhotseat.HotseatPredictionController;
 import com.android.launcher3.logging.InstanceId;
 import com.android.launcher3.logging.StatsLogManager.StatsLogger;
@@ -104,9 +103,7 @@
     @Override
     protected void setupViews() {
         super.setupViews();
-        if (FeatureFlags.ENABLE_HYBRID_HOTSEAT.get()) {
-            mHotseatPredictionController = new HotseatPredictionController(this);
-        }
+        mHotseatPredictionController = new HotseatPredictionController(this);
     }
 
     @Override
@@ -141,9 +138,7 @@
         }
         logger.log(LAUNCHER_APP_LAUNCH_TAP);
 
-        if (mHotseatPredictionController != null) {
-            mHotseatPredictionController.logLaunchedAppRankingInfo(info, instanceId);
-        }
+        mHotseatPredictionController.logLaunchedAppRankingInfo(info, instanceId);
     }
 
     /**
@@ -166,10 +161,8 @@
 
     @Override
     public boolean startActivitySafely(View v, Intent intent, ItemInfo item) {
-        if (mHotseatPredictionController != null) {
-            // Only pause is taskbar controller is not present
-            mHotseatPredictionController.setPauseUIUpdate(getTaskbarController() == null);
-        }
+        // Only pause is taskbar controller is not present
+        mHotseatPredictionController.setPauseUIUpdate(getTaskbarController() == null);
         return super.startActivitySafely(v, intent, item);
     }
 
@@ -181,7 +174,7 @@
             onStateOrResumeChanging((getActivityFlags() & ACTIVITY_STATE_TRANSITION_ACTIVE) == 0);
         }
 
-        if (mHotseatPredictionController != null && ((changeBits & ACTIVITY_STATE_STARTED) != 0
+        if (((changeBits & ACTIVITY_STATE_STARTED) != 0
                 || (changeBits & getActivityFlags() & ACTIVITY_STATE_DEFERRED_RESUMED) != 0)) {
             mHotseatPredictionController.setPauseUIUpdate(false);
         }
@@ -195,12 +188,8 @@
 
     @Override
     public Stream<SystemShortcut.Factory> getSupportedShortcuts() {
-        if (mHotseatPredictionController != null) {
-            return Stream.concat(super.getSupportedShortcuts(),
-                    Stream.of(mHotseatPredictionController));
-        } else {
-            return super.getSupportedShortcuts();
-        }
+        return Stream.concat(
+                super.getSupportedShortcuts(), Stream.of(mHotseatPredictionController));
     }
 
     /**
@@ -227,8 +216,7 @@
             mAllAppsPredictions = item;
             getAppsView().getFloatingHeaderView().findFixedRowByType(PredictionRowView.class)
                     .setPredictedApps(item.items);
-        } else if (item.containerId == Favorites.CONTAINER_HOTSEAT_PREDICTION
-                && mHotseatPredictionController != null) {
+        } else if (item.containerId == Favorites.CONTAINER_HOTSEAT_PREDICTION) {
             mHotseatPredictionController.setPredictedItems(item);
         }
     }
@@ -246,10 +234,7 @@
     public void onDestroy() {
         super.onDestroy();
         getAppsView().getSearchUiManager().destroy();
-        if (mHotseatPredictionController != null) {
-            mHotseatPredictionController.destroy();
-            mHotseatPredictionController = null;
-        }
+        mHotseatPredictionController.destroy();
     }
 
     @Override
diff --git a/quickstep/src/com/android/quickstep/util/MotionPauseDetector.java b/quickstep/src/com/android/quickstep/util/MotionPauseDetector.java
index 8cde5f2..8151d41 100644
--- a/quickstep/src/com/android/quickstep/util/MotionPauseDetector.java
+++ b/quickstep/src/com/android/quickstep/util/MotionPauseDetector.java
@@ -15,8 +15,6 @@
  */
 package com.android.quickstep.util;
 
-import static com.android.launcher3.config.FeatureFlags.ENABLE_SYSTEM_VELOCITY_PROVIDER;
-
 import android.content.Context;
 import android.content.res.Resources;
 import android.view.MotionEvent;
@@ -51,7 +49,7 @@
     private final Alarm mForcePauseTimeout;
     private final boolean mMakePauseHarderToTrigger;
     private final Context mContext;
-    private final VelocityProvider mVelocityProvider;
+    private final SystemVelocityProvider mVelocityProvider;
 
     private Float mPreviousVelocity = null;
 
@@ -88,8 +86,7 @@
         mForcePauseTimeout = new Alarm();
         mForcePauseTimeout.setOnAlarmListener(alarm -> updatePaused(true /* isPaused */));
         mMakePauseHarderToTrigger = makePauseHarderToTrigger;
-        mVelocityProvider = ENABLE_SYSTEM_VELOCITY_PROVIDER.get()
-                ? new SystemVelocityProvider(axis) : new LinearVelocityProvider(axis);
+        mVelocityProvider = new SystemVelocityProvider(axis);
     }
 
     /**
@@ -124,8 +121,8 @@
         mForcePauseTimeout.setAlarm(mMakePauseHarderToTrigger
                 ? HARDER_TRIGGER_TIMEOUT
                 : FORCE_PAUSE_TIMEOUT);
-        Float newVelocity = mVelocityProvider.addMotionEvent(ev, pointerIndex);
-        if (newVelocity != null && mPreviousVelocity != null) {
+        float newVelocity = mVelocityProvider.addMotionEvent(ev, pointerIndex);
+        if (mPreviousVelocity != null) {
             checkMotionPaused(newVelocity, mPreviousVelocity, ev.getEventTime());
         }
         mPreviousVelocity = newVelocity;
@@ -210,58 +207,7 @@
         default void onMotionPauseChanged(boolean isPaused) { }
     }
 
-    /**
-     * Interface to abstract out velocity calculations
-     */
-    protected interface VelocityProvider {
-
-        /**
-         * Adds a new motion events, and returns the velocity at this point, or null if
-         * the velocity is not available
-         */
-        Float addMotionEvent(MotionEvent ev, int pointer);
-
-        /**
-         * Clears all stored motion event records
-         */
-        void clear();
-    }
-
-    private static class LinearVelocityProvider implements VelocityProvider {
-
-        private Long mPreviousTime = null;
-        private Float mPreviousPosition = null;
-
-        private final int mAxis;
-
-        LinearVelocityProvider(int axis) {
-            mAxis = axis;
-        }
-
-        @Override
-        public Float addMotionEvent(MotionEvent ev, int pointer) {
-            long time = ev.getEventTime();
-            float position = ev.getAxisValue(mAxis, pointer);
-            Float velocity = null;
-
-            if (mPreviousTime != null && mPreviousPosition != null) {
-                long changeInTime = Math.max(1, time - mPreviousTime);
-                float changeInPosition = position - mPreviousPosition;
-                velocity = changeInPosition / changeInTime;
-            }
-            mPreviousTime = time;
-            mPreviousPosition = position;
-            return velocity;
-        }
-
-        @Override
-        public void clear() {
-            mPreviousTime = null;
-            mPreviousPosition = null;
-        }
-    }
-
-    private static class SystemVelocityProvider implements VelocityProvider {
+    private static class SystemVelocityProvider {
 
         private final VelocityTracker mVelocityTracker;
         private final int mAxis;
@@ -271,8 +217,11 @@
             mAxis = axis;
         }
 
-        @Override
-        public Float addMotionEvent(MotionEvent ev, int pointer) {
+        /**
+         * Adds a new motion events, and returns the velocity at this point, or null if
+         * the velocity is not available
+         */
+        public float addMotionEvent(MotionEvent ev, int pointer) {
             mVelocityTracker.addMovement(ev);
             mVelocityTracker.computeCurrentVelocity(1); // px / ms
             return mAxis == MotionEvent.AXIS_X
@@ -280,7 +229,9 @@
                     : mVelocityTracker.getYVelocity(pointer);
         }
 
-        @Override
+        /**
+         * Clears all stored motion event records
+         */
         public void clear() {
             mVelocityTracker.clear();
         }
diff --git a/quickstep/src/com/android/quickstep/util/QuickstepOnboardingPrefs.java b/quickstep/src/com/android/quickstep/util/QuickstepOnboardingPrefs.java
index cb81d36..b316423 100644
--- a/quickstep/src/com/android/quickstep/util/QuickstepOnboardingPrefs.java
+++ b/quickstep/src/com/android/quickstep/util/QuickstepOnboardingPrefs.java
@@ -66,8 +66,7 @@
             });
         }
 
-        if (FeatureFlags.ENABLE_HYBRID_HOTSEAT.get() && !hasReachedMaxCount(
-                HOTSEAT_DISCOVERY_TIP_COUNT)) {
+        if (!hasReachedMaxCount(HOTSEAT_DISCOVERY_TIP_COUNT)) {
             stateManager.addStateListener(new StateListener<LauncherState>() {
                 boolean mFromAllApps = false;
 
diff --git a/src/com/android/launcher3/InvariantDeviceProfile.java b/src/com/android/launcher3/InvariantDeviceProfile.java
index 5fd9e01..aa3ef9b 100644
--- a/src/com/android/launcher3/InvariantDeviceProfile.java
+++ b/src/com/android/launcher3/InvariantDeviceProfile.java
@@ -18,7 +18,6 @@
 
 import static com.android.launcher3.Utilities.getDevicePrefs;
 import static com.android.launcher3.Utilities.getPointString;
-import static com.android.launcher3.config.FeatureFlags.APPLY_CONFIG_AT_RUNTIME;
 import static com.android.launcher3.config.FeatureFlags.ENABLE_FOUR_COLUMNS;
 import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
 import static com.android.launcher3.util.PackageManagerHelper.getPackageFilter;
@@ -174,8 +173,7 @@
                 .putString(KEY_MIGRATION_SRC_WORKSPACE_SIZE, getPointString(numColumns, numRows))
                 .apply();
 
-        mConfigMonitor = new ConfigMonitor(context,
-                APPLY_CONFIG_AT_RUNTIME.get() ? this::onConfigChanged : this::killProcess);
+        mConfigMonitor = new ConfigMonitor(context, this::onConfigChanged);
         mOverlayMonitor = new OverlayMonitor(context);
     }
 
@@ -317,11 +315,6 @@
         mChangeListeners.remove(listener);
     }
 
-    private void killProcess(Context context) {
-        Log.e("ConfigMonitor", "restarting launcher");
-        android.os.Process.killProcess(android.os.Process.myPid());
-    }
-
     public void verifyConfigChangedInBackground(final Context context) {
         String savedIconMaskPath = getDevicePrefs(context).getString(KEY_ICON_PATH_REF, "");
         // Good place to check if grid size changed in themepicker when launcher was dead.
diff --git a/src/com/android/launcher3/config/FeatureFlags.java b/src/com/android/launcher3/config/FeatureFlags.java
index b61799f..625aafb 100644
--- a/src/com/android/launcher3/config/FeatureFlags.java
+++ b/src/com/android/launcher3/config/FeatureFlags.java
@@ -72,9 +72,6 @@
             "PROMISE_APPS_NEW_INSTALLS", true,
             "Adds a promise icon to the home screen for new install sessions.");
 
-    public static final BooleanFlag APPLY_CONFIG_AT_RUNTIME = getDebugFlag(
-            "APPLY_CONFIG_AT_RUNTIME", true, "Apply display changes dynamically");
-
     public static final BooleanFlag QUICKSTEP_SPRINGS = getDebugFlag(
             "QUICKSTEP_SPRINGS", true, "Enable springs for quickstep animations");
 
@@ -133,9 +130,6 @@
             "ASSISTANT_GIVES_LAUNCHER_FOCUS", false,
             "Allow Launcher to handle nav bar gestures while Assistant is running over it");
 
-    public static final BooleanFlag ENABLE_HYBRID_HOTSEAT = getDebugFlag(
-            "ENABLE_HYBRID_HOTSEAT", true, "Fill gaps in hotseat with predicted apps");
-
     public static final BooleanFlag HOTSEAT_MIGRATE_TO_FOLDER = getDebugFlag(
             "HOTSEAT_MIGRATE_TO_FOLDER", false, "Should move hotseat items into a folder");
 
@@ -175,10 +169,6 @@
             "Replace Smartspace with the enhanced version. "
               + "Ignored if ENABLE_SMARTSPACE_UNIVERSAL is enabled.");
 
-    public static final BooleanFlag ENABLE_SYSTEM_VELOCITY_PROVIDER = getDebugFlag(
-            "ENABLE_SYSTEM_VELOCITY_PROVIDER", true,
-            "Use system VelocityTracker's algorithm for motion pause detection.");
-
     public static final BooleanFlag ALWAYS_USE_HARDWARE_OPTIMIZATION_FOR_FOLDER_ANIMATIONS =
             getDebugFlag(
             "ALWAYS_USE_HARDWARE_OPTIMIZATION_FOR_FOLDER_ANIMATIONS", false,
diff --git a/src/com/android/launcher3/logging/FileLog.java b/src/com/android/launcher3/logging/FileLog.java
index 6bc1ecb..cdd0bda 100644
--- a/src/com/android/launcher3/logging/FileLog.java
+++ b/src/com/android/launcher3/logging/FileLog.java
@@ -10,7 +10,6 @@
 
 import androidx.annotation.VisibleForTesting;
 
-import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.util.IOUtils;
 
 import java.io.BufferedReader;
@@ -43,7 +42,7 @@
     private static Handler sHandler = null;
     private static File sLogsDirectory = null;
 
-    public static final int LOG_DAYS = FeatureFlags.ENABLE_HYBRID_HOTSEAT.get() ? 10 : 4;
+    public static final int LOG_DAYS = 4;
 
     public static void setDir(File logsDir) {
         if (ENABLED) {