remove AOKP incompatible overlays

Change-Id: I9bd7498475f4f1cca53484ee0e3acccde85bea8f
Signed-off-by: ChampionSwimmer <android@championswimmer.tk>
Revert "switch to releasetools extensions"

This reverts commit 12672cda8b01a695e7e5368b797a2ce2788628f7.