Remove unused global const variable am: 6dc643db27 am: 838ace29ba am: a0c6cd4cc8

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

Change-Id: Ic569103f2f891f242c41355d901aa86908e4a12a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>