batman-adv: remove duplicated line in comment

Remove an accidentally added duplicated line in a function comment
Signed-off-by: NAntonio Quartulli <ordex@autistici.org>

net/batman-adv/bridge_loop_avoidance.c

@@ -734,7 +734,6 @@ static int handle_claim(struct bat_priv *bat_priv,
 }
 
 /**
- * @bat_priv: the bat priv with all the soft interface information
  * @bat_priv: the bat priv with all the soft interface information
  * @hw_src: the Hardware source in the ARP Header
  * @hw_dst: the Hardware destination in the ARP Header