MLTS Arm Support Library - Remove the fp16 relaxing option. am: f46f87d39a am: d0b504e954 am: 5842374c7c am: 9d0e210582

Original change: https://android-review.googlesource.com/c/platform/test/mlts/benchmark/+/2112517

Change-Id: I56c9a8bbfe8c0c86d377ef39b73238022555f31c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>