Remove ART run-test 648-many-direct-methods.

This test is stressing dex2oatd and fails on too many configurations;
remove it for now.

(cherry picked from commit eed8ca45960379e55956cb60e32fcbf5be999e54)

Test: Rely on automated testing.
Bug: b/33650497
Change-Id: I4542b4833d46cb312763c112570e7751702134cd
4 files changed