Remove unused interface and implementation

Get rid of the unused method to mitigate the potential information
leakage.

Bug: 185124942
Test: atest view-compiler-tests
Test: atest android.view.cts.LayoutInflaterTest
Test: atest -p core/java/android/content/pm
Test: atest -p services/core/java/com/android/server/pm
Test: manually using the PoC in the buganizer to ensure the symptom
      no longer exists.
Change-Id: I5ee7381728a93535849fcf61a1373a5ed9036aa4