Revert "CHA for abstract methods."

This reverts commit ae6c189b9d63ca4c2ae0e952187819c5e442e3c9.

This is causing sporadic build failures with:
dex2oatd F 01-20 15:05:33 8343 10164 cha.cc:292] Check failed: method_in_super->HasSingleImplementation() 

Change-Id: I4435ab028d3f7893e18b44347f294326c573a255
10 files changed