ipv6: hash is calculated but not used afterwards

hash is declared and assigned but not used anymore. ipv6_addr_hash()
exhibit no side-effects.
Signed-off-by: NHagen Paul Pfeifer <hagen@jauu.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv6/addrconf.c

@@ -718,12 +718,9 @@ static void ipv6_del_addr(struct inet6_ifaddr *ifp)
 	struct inet6_ifaddr *ifa, *ifn;
 	struct inet6_dev *idev = ifp->idev;
 	int state;
-	int hash;
 	int deleted = 0, onlink = 0;
 	unsigned long expires = jiffies;
 
-	hash = ipv6_addr_hash(&ifp->addr);
-
 	spin_lock_bh(&ifp->state_lock);
 	state = ifp->state;
 	ifp->state = INET6_IFADDR_STATE_DEAD;