Revert "sched: pack small tasks: fix printk formating"

This reverts commit f29aad4d472e9e78760976ff90e2cce7b063fab3.
Revert "sched: secure access to other CPU statistics"

This reverts commit 29f232d4325479e3dd77452b8392dac096772319.
Revert "sched: pack small tasks"

This reverts commit 5661095d1918c51d1fc83ded2452e01657112375.