Remove unused UnsupportedAppUsage annotations.

The new annotation is android.compat.annotation.UnsupportedAppUsage.

Test: m
Bug: 145132366
Exempt-From-Owner-Approval: approved in internal
Change-Id: Ie12e28eee0ed20b5677ee3162143700813b7ab64
Merged-In: Ie12e28eee0ed20b5677ee3162143700813b7ab64
2 files changed