SLUB: killed the unused "end" variable

Since the macro "for_each_object" introduced, the "end" variable becomes unused anymore.
Signed-off-by: Denis Cheng <crquan@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm/slub.c

@@ -1080,7 +1080,6 @@ static struct page *new_slab(struct kmem_cache *s, gfp_t flags, int node)
 	struct page *page;
 	struct kmem_cache_node *n;
 	void *start;
-	void *end;
 	void *last;
 	void *p;
 
@@ -1101,7 +1100,6 @@ static struct page *new_slab(struct kmem_cache *s, gfp_t flags, int node)
 		SetSlabDebug(page);
 
 	start = page_address(page);
-	end = start + s->objects * s->size;
 
 	if (unlikely(s->flags & SLAB_POISON))
 		memset(start, POISON_INUSE, PAGE_SIZE << s->order);