Get rid of unused notification_badging_enabled configuration. am: e941d72380 am: 4a24d3635e

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

Change-Id: I9614da9bfba6be05ca35770a3b7f3c342a5bc7a2