Revert "Warn on overriding of hidden methods"

This reverts commit fc66129b478d49f493b8262f81f8813a5f41459e.

Reason for revert: This was also reverted in internal

Bug: 64382372
Merged-In: I69bdc0fb79831b5ce546205fd40a3300d039de71
Change-Id: Ice53e73eae7313ae6c72369a1b2e984fb978f2ab
5 files changed