net: sched: cls_u32: get rid of tc_u_common ->rcu

unused
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: NJamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/sched/cls_u32.c

@@ -98,7 +98,6 @@ struct tc_u_common {
 	int			refcnt;
 	struct idr		handle_idr;
 	struct hlist_node	hnode;
-	struct rcu_head		rcu;
 };
 
 static inline unsigned int u32_hash_fold(__be32 key,