Merge "Remove unused LOCAL_ variables and related logic in hardware/interfaces/compatibility_matrices/compatibility_matrix.mk." into main am: fc8d55a0bf am: 0c487a312b

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/3212254

Change-Id: I71b7588e47ba4dd2e7cca73a1abc46b7d1095972
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>