Remove unused global const variable am: 6dc643db27 am: 16e747fe60

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

Change-Id: Ie8fc6494c582e305e91e84383e7e7f46b0b81e78
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>