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

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

Change-Id: I5c26f6205a5e0637493f43eefa5be771084a99e7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>