Removed obsolete Test

The HidlizationEquivalenceTest was used to make sure the same key is
computed by the scrypt algorithm regardless of whether the old
(<= KM2 HAL pre treble) or the new (>= KM3.0 treble) HAL was used.
Since the treble is now the default, and old HAL don't even exist on
new devices, we should call the migration a success and drop this test
altogether.

Test: Removed obsolete Code
Bug: 68197448
Change-Id: If10c79bafac4d0c8268675cbb8e1c4b46974aab5