This reverts commit 419395675d4b48b461bc78cd9fc2faddd326abfe.
Revert "[backport] sched_rt: Upstream fixes"

This reverts commit 488338e3c47ac7c6e547d36519c9adce5209504b.

Change-Id: I70820e0dce8a096d99d3df413e3e657839e73a1c