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/include/linux/icmpv6.h b/include/linux/icmpv6.h
index c0d8357..4c4c74e 100644
--- a/include/linux/icmpv6.h
+++ b/include/linux/icmpv6.h
@@ -174,8 +174,7 @@
 
 extern void				icmpv6_send(struct sk_buff *skb,
 						    u8 type, u8 code,
-						    __u32 info, 
-						    struct net_device *dev);
+						    __u32 info);
 
 extern int				icmpv6_init(void);
 extern int				icmpv6_err_convert(u8 type, u8 code,