Merge "Remove unused variables" am: fe0c000f40 am: 752ef94cfc am: d847619a2b

Original change: https://android-review.googlesource.com/c/platform/packages/inputmethods/LatinIME/+/2445925

Change-Id: I7efbfd50628298c436cb86d5d84af6cbfa7918da
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>