Revert "Add TEST_MAPPING for android.platform.test.scenario.biometrics"

This reverts commit f3dcd5b7.

Reason for revert: Seems to have triggered a huge number of non platinum tests in Platinum suite.

Bug: 257393307
Bug: 257208080
Change-Id: Ieb6fc56cedccd284b1137eee95c0b01f84a41bbd