rcu: remove unused __list_for_each_rcu() macro

Signed-off-by: NPaul E. McKenney <paulmck@linux.vnet.ibm.com>

include/linux/rculist.h

@@ -241,11 +241,6 @@ static inline void list_splice_init_rcu(struct list_head *list,
 #define list_first_entry_rcu(ptr, type, member) \
 	list_entry_rcu((ptr)->next, type, member)
 
-#define __list_for_each_rcu(pos, head) \
-	for (pos = rcu_dereference_raw(list_next_rcu(head)); \
-		pos != (head); \
-		pos = rcu_dereference_raw(list_next_rcu(pos)))
-
 /**
  * list_for_each_entry_rcu	-	iterate over rcu list of given type
  * @pos:	the type * to use as a loop cursor.