Revert "hrtimers: Push pending hrtimers away from outgoing CPU earlier"

hulk inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I8OSNK


CVE: NA

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Commit 4cf0b18c("hrtimers: Push pending hrtimers away from outgoing CPU earlier")
introduce the following issue:
- CPU1 goes offline and all hrtimers are migrated to other CPUs
- CPU1 continues the offline process and migrates all tasks. In some
 case, hrtimer_start will be called to restart cfs_period_timer
- CPU1 shuts down and does not handle timers, task throttled by CFS
  bandwidth never get scheduled.

So revert it before we provide a better solution.

This reverts commit 4cf0b18c.

Signed-off-by: Yu Liao <liaoyu15@huawei.com>