SLUB: Remove useless masking of GFP_ZERO

Matt added a useless masking of GFP_ZERO. GFP_ZERO is already masked out
in new_slab(). No need to do it twice. This reverts the SLUB parts of
7fd272550bd43cc1d7289ef0ab2fa50de137e767.

Cc: Linus Torvalds <torvalds@woody.linux-foundation.org>
Cc: Matt Mackall <mpm@selenic.com>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Christoph Lameter <clameter@sgi.com>

Index: linux-2.6/mm/slub.c
===================================================================
--- linux-2.6.orig/mm/slub.c	2007-12-13 12:41:34.000000000 -0800
+++ linux-2.6/mm/slub.c	2007-12-13 12:42:03.000000000 -0800
@@ -1468,9 +1468,6 @@ static void *__slab_alloc(struct kmem_ca
 	void **object;
 	struct page *new;
 
-	/* We handle __GFP_ZERO in the caller */
-	gfpflags &= ~__GFP_ZERO;
-
 	if (!c->page)
 		goto new_slab;