prune_super(): sb->s_op is never NULL

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/super.c

@@ -71,7 +71,7 @@ static int prune_super(struct shrinker *shrink, struct shrink_control *sc)
 	if (!grab_super_passive(sb))
 		return -1;
 
-	if (sb->s_op && sb->s_op->nr_cached_objects)
+	if (sb->s_op->nr_cached_objects)
 		fs_objects = sb->s_op->nr_cached_objects(sb);
 
 	total_objects = sb->s_nr_dentry_unused +