Removed unused function sctp_addr_is_valid()

sctp_addr_is_valid() only appeared in its definition.
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Sébastien Barré <sebastien.barre@uclouvain.be>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/sctp/structs.h

@@ -1116,7 +1116,6 @@ int sctp_raw_to_bind_addrs(struct sctp_bind_addr *bp, __u8 *raw, int len,
 sctp_scope_t sctp_scope(const union sctp_addr *);
 int sctp_in_scope(struct net *net, const union sctp_addr *addr, const sctp_scope_t scope);
 int sctp_is_any(struct sock *sk, const union sctp_addr *addr);
-int sctp_addr_is_valid(const union sctp_addr *addr);
 int sctp_is_ep_boundall(struct sock *sk);