aio: remove unused aio_run_iocbs()

aio_run_iocbs() is not used at all, so get rid of it.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>