Merge "Remove unused variables" am: fe0c000f40 am: 752ef94cfc am: d847619a2b am: 64ce9427f8 am: 54fceaea60

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

Change-Id: I1186e64df9bad9d5d78053fab11ce0b14573d781
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>