bridge: cleanup: remove unneed check

We dereference "port" on the lines immediately before and immediately
after the test so port should hopefully never be null here.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/bridge/br_multicast.c

@@ -627,8 +627,8 @@ static void br_multicast_port_query_expired(unsigned long data)
 	struct net_bridge *br = port->br;
 
 	spin_lock(&br->multicast_lock);
-	if (port && (port->state == BR_STATE_DISABLED ||
-		     port->state == BR_STATE_BLOCKING))
+	if (port->state == BR_STATE_DISABLED ||
+	    port->state == BR_STATE_BLOCKING)
 		goto out;
 
 	if (port->multicast_startup_queries_sent <