Get rid of unused notification_badging_enabled configuration.

Bug: 159637333
Test: Manual tests by building system image and testing launcher app.
Change-Id: I0a7a3048ae6b4ffa52497748f45a6cf366fe0433
diff --git a/go/res/values-v26/bools.xml b/go/res/values-v26/bools.xml
index 797adda..1584734 100644
--- a/go/res/values-v26/bools.xml
+++ b/go/res/values-v26/bools.xml
@@ -18,6 +18,5 @@
 
 <resources>
     <bool name="notification_dots_enabled">false</bool>
-    <bool name="notification_badging_enabled">false</bool>
 </resources>