Remove neuralnetworks_float16. am: a644d5cd49

Original change: https://android-review.googlesource.com/c/platform/test/mlts/benchmark/+/2322733

Change-Id: I752ca3ba8fb3c7649a631bccfd03c58c91358eb1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>