Bluetooth: Remove unused struct l2cap_conn item

Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>

include/net/bluetooth/l2cap.h

@@ -301,7 +301,6 @@ struct l2cap_conn {
 
 	struct sk_buff *rx_skb;
 	__u32		rx_len;
-	__u8		rx_ident;
 	__u8		tx_ident;
 
 	__u8		disc_reason;