nfsd: remove unused cache_for_each macro

This macro is unused.
Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu>
Acked-by: Neil Brown <neilb@suse.de>

include/linux/sunrpc/cache.h

@@ -136,16 +136,6 @@ sunrpc_cache_update(struct cache_detail *detail,
 		    struct cache_head *new, struct cache_head *old, int hash);
 
 
-#define cache_for_each(pos, detail, index, member) 						\
-	for (({read_lock(&(detail)->hash_lock); index = (detail)->hash_size;}) ;		\
-	     ({if (index==0)read_unlock(&(detail)->hash_lock); index--;});			\
-		)										\
-		for (pos = container_of((detail)->hash_table[index], typeof(*pos), member);	\
-		     &pos->member;								\
-		     pos = container_of(pos->member.next, typeof(*pos), member))
-
-	     
-
 extern void cache_clean_deferred(void *owner);
 
 static inline struct cache_head  *cache_get(struct cache_head *h)