mm/page_alloc.c: remove unnecessary parameter from __rmqueue

mm/page_alloc.c: remove unnecessary parameter from __rmqueue

Commit 0aaa29a56e4f ("mm, page_alloc: reserve pageblocks for high-order
atomic allocations on demand") added an unnecessary and unused parameter
to __rmqueue.  It was a parameter that was used in an earlier version of
the patch and then left behind.  This patch cleans it up.

Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>