Clean up after obsolete methods update fix.

This is a follow-up after
    https://android-review.googlesource.com/942485 ,
addressing most of the late comments.

Test: m test-art-host-gtest
Test: testrunner.py --host --optimizing --interpreter
Bug: 73333076
Change-Id: I52c0a3cbf81e97474dc46846486263946379416a
4 files changed