Revert "scx_rustland_core: prevent deadlock with per-CPU DSQs and CPU… #706
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… affinity"
It seems that with the latest kernel the per-CPU DSQ stall while executing sched_setaffinity() doesn't happen anymore.
Therefore, get rid of the temporary workaround introduced by commit 86db45f ("scx_rustland_core: prevent deadlock with per-CPU DSQs and CPU affinity") and restore the old behavior, which offers more fair scheduling policy.