sctp: remove the unused sctp_assoc_is_match function

After Commit 4f0087812648 ("sctp: apply rhashtable api to send/recv
path"), there's no place using sctp_assoc_is_match, so remove it.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/sctp/structs.h

@@ -2091,10 +2091,6 @@ void sctp_assoc_control_transport(struct sctp_association *asoc,
 				  enum sctp_transport_cmd command,
 				  sctp_sn_error_t error);
 struct sctp_transport *sctp_assoc_lookup_tsn(struct sctp_association *, __u32);
-struct sctp_transport *sctp_assoc_is_match(struct sctp_association *,
-					   struct net *,
-					   const union sctp_addr *,
-					   const union sctp_addr *);
 void sctp_assoc_migrate(struct sctp_association *, struct sock *);
 int sctp_assoc_update(struct sctp_association *old,
 		      struct sctp_association *new);

net/sctp/associola.c

@@ -988,31 +988,6 @@ out:
 	return match;
 }
 
-/* Is this the association we are looking for? */
-struct sctp_transport *sctp_assoc_is_match(struct sctp_association *asoc,
-					   struct net *net,
-					   const union sctp_addr *laddr,
-					   const union sctp_addr *paddr)
-{
-	struct sctp_transport *transport;
-
-	if ((htons(asoc->base.bind_addr.port) == laddr->v4.sin_port) &&
-	    (htons(asoc->peer.port) == paddr->v4.sin_port) &&
-	    net_eq(sock_net(asoc->base.sk), net)) {
-		transport = sctp_assoc_lookup_paddr(asoc, paddr);
-		if (!transport)
-			goto out;
-
-		if (sctp_bind_addr_match(&asoc->base.bind_addr, laddr,
-					 sctp_sk(asoc->base.sk)))
-			goto out;
-	}
-	transport = NULL;
-
-out:
-	return transport;
-}
-
 /* Do delayed input processing.  This is scheduled by sctp_rcv(). */
 static void sctp_assoc_bh_rcv(struct work_struct *work)
 {