Remove neuralnetworks_float16. am: a644d5cd49 am: 2715ab360c

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

Change-Id: I01fe92feb970876fae1d2ea55212ae36a51af3ef
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>