Remove unsupportedappusage-annotation library.

It is not needed anymore, and is replaced by "unsupportedappusage" library.

Bug: 145132366
Test: m
Change-Id: I589b3f80979e38ff81ff5f0ad2de1ae8df9c9f00
Merged-In: I589b3f80979e38ff81ff5f0ad2de1ae8df9c9f00
Exempt-From-Owner-Approval: clean up