Remove IME visibility check before closing the keyboard

Bug: 185890446
Test: manual

TL;DR;;
In racy condition, keyboard is not visible when the check happens
but in next frame, it becomes visible.

Change-Id: I3336f3c967804e5ccdea9110c363e92d83b7bc02
diff --git a/src/com/android/launcher3/util/UiThreadHelper.java b/src/com/android/launcher3/util/UiThreadHelper.java
index b9387a8..cb721e6 100644
--- a/src/com/android/launcher3/util/UiThreadHelper.java
+++ b/src/com/android/launcher3/util/UiThreadHelper.java
@@ -25,11 +25,9 @@
 import android.os.IBinder;
 import android.os.Message;
 import android.view.View;
-import android.view.WindowInsets;
 import android.view.inputmethod.InputMethodManager;
 
 import com.android.launcher3.Launcher;
-import com.android.launcher3.Utilities;
 import com.android.launcher3.views.ActivityContext;
 
 /**
@@ -48,14 +46,6 @@
     @SuppressLint("NewApi")
     public static void hideKeyboardAsync(ActivityContext activityContext, IBinder token) {
         View root = activityContext.getDragLayer();
-        if (Utilities.ATLEAST_R) {
-            WindowInsets rootInsets = root.getRootWindowInsets();
-            boolean isImeShown = rootInsets != null && rootInsets.isVisible(
-                    WindowInsets.Type.ime());
-            if (!isImeShown) {
-                return;
-            }
-        }
 
         Message.obtain(HANDLER.get(root.getContext()),
                 MSG_HIDE_KEYBOARD, token).sendToTarget();