trusty:pac: remove pac_keys test am: b2a63b7eca am: e204421147

Original change: https://android-review.googlesource.com/c/trusty/lk/trusty/+/2692488

Change-Id: I36442cb0260cc64a9545532d2775ae61a82999c0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>