MLTS Arm Support Library - Remove the fp16 relaxing option. am: f46f87d39a

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

Change-Id: I63ccd6f72e2f3da810a29515715c6d6739c7e834
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>