Get rid of unused notification_badging_enabled configuration. am: e941d723...

Get rid of unused notification_badging_enabled configuration. am: e941d723 am: 4a24d363 am: aa84899a

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/11959139

Change-Id: I6ada5d4bdfd80b7678a9389d81354410302df8d1