Get rid of unused notification_badging_enabled configuration. am: e941d72380 am: adcd80a944 am: a2ff194216 am: df1c8f4206

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

Change-Id: I3f7e0175af1db99fe61bd79e3cf41f2b12fd6a25