Revert "sched: Añadida llamada faltante calc_load_exit_idle()"

This reverts commit d363e6d377ebd2999498cf8a0aafa4cc4f0770fc.
Revert "sched/nohz: cálculo de load-avg mas preciso"

This reverts commit afec22abef38bcab77587a08b65986bc546c2faf.

Conflicts:

	kernel/sched.c
update