Revert "scheduler: Re-compute time-average nr_running on read"

This reverts commit e8ec6d1049ef9a878a6eee531d98038fcf1b0bd0.
Revert "proc: enhance time-average nr_running stats"

This reverts commit 6672d24e97fe3d89ea3dc92d511ae75c4648791a.
Revert "scheduler: compute time-average nr_running per run-queue"

This reverts commit 1d7d559aff9afb29d006ce093d108ae91c35dc19.
intelli_plug: refactor stats calculation code to be less intrusive

this is done for those kernels which do not have 100% source code available
and must use existing closed source modules such as wifi drivers

Signed-off-by: Paul Reioux <reioux@gmail.com>