Remove unused global const variable am: 6dc643db27 am: 838ace29ba am: 82e07b6550

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/3298493

Change-Id: I1fd8457a52c66cc74291d3402442ff4ee2d83b58
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>