Revert "[PATCH] sched: fix interactive task starvation"

Revert "[PATCH] sched: fix interactive task starvation"

This reverts commit 5ce74abe788a26698876e66b9c9ce7e7acc25413 (and its
dependent commit 8a5bc075b8d8cf7a87b3f08fad2fba0f5d13295e), because of
audio underruns.

Reported by Rene Herman <rene.herman@keyaccess.nl>, who also pinpointed
the exact cause of the underruns:

  "Audio underruns galore, with only ogg123 and firefox (browsing the
   GIT tree online is also a nice trigger by the way).

   If I back it out, everything is fine for me again."

Cc: Rene Herman <rene.herman@keyaccess.nl>
Cc: Mike Galbraith <efault@gmx.de>
Acked-by: Con Kolivas <kernel@kolivas.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>