ipv6: drop unused "dev" arg of icmpv6_send()

Dunno, what was the idea, it wasn't used for a long time.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/mip6.c b/net/ipv6/mip6.c
index f797e8c..2794b60 100644
--- a/net/ipv6/mip6.c
+++ b/net/ipv6/mip6.c
@@ -56,7 +56,7 @@
 
 static inline void mip6_param_prob(struct sk_buff *skb, u8 code, int pos)
 {
-	icmpv6_send(skb, ICMPV6_PARAMPROB, code, pos, skb->dev);
+	icmpv6_send(skb, ICMPV6_PARAMPROB, code, pos);
 }
 
 static int mip6_mh_len(int type)