Revert "sched: fix nohz idle load balancer issues (part 2)"

This reverts commit 3b02545a61cd613e9538f2ff2bec3a3320096c4c.
Revert "sched: fix nohz idle load balancer issues"

This reverts commit 6da2f5a51b8ff60c44632ac3f3cf62dde5fe62ed.