Remove unnecessary copy of transition adapter utils.

This is no-longer needed now that shell.util is accessible
to shared and it was becoming out-of-sync with TransitionUtil
resulting in some potential NPEs and such.

Bug: 281869091
Test: existing tests, this should be a net-no-op.
Change-Id: Ib891d67f07d15f2e0efcaff123d1fec02abea1d7