Remove code for auto-revoke not being enabled

The hibernation job runs on all devices (on R, the job runs as the
auto-revoke job), and no studies have disabled the job since R. Removes
the dead code to simplify logic and clean things up a bit.

Bug: 221971321
Test: builds
Change-Id: I249d83c4c67f0e9ce7397fb7d9ba2bdd33adcbb6