[LLC] remove sap->mac_pdu_q, not used at all

Also remove some unneeded struct forward declarations.

include/net/llc_conn.h

@@ -70,8 +70,6 @@ struct llc_opt {
 
 #define llc_sk(__sk) ((struct llc_opt *)(__sk)->protinfo)
 
-struct llc_conn_state_ev;
-
 extern struct sock *llc_sk_alloc(int family, int priority);
 extern void llc_sk_free(struct sock *sk);
 

include/net/llc_main.h

@@ -52,7 +52,6 @@ struct llc_station {
 	} ev_q;
 	struct sk_buff_head	    mac_pdu_q;
 };
-struct llc_station_state_ev;
 
 extern struct llc_sap *llc_sap_alloc(void);
 extern void llc_sap_save(struct llc_sap *sap);

include/net/llc_sap.h

@@ -23,7 +23,6 @@
  * @laddr - SAP value in this 'lsap'
  * @node - entry in station sap_list
  * @sk_list - LLC sockets this one manages
- * @mac_pdu_q - PDUs ready to send to MAC
  */
 struct llc_sap {
 	struct llc_station *station;
@@ -39,9 +38,7 @@ struct llc_sap {
 		rwlock_t    lock;
 		struct sock *list;
 	} sk_list;
-	struct sk_buff_head mac_pdu_q;
 };
-struct llc_sap_state_ev;
 
 extern void llc_sap_assign_sock(struct llc_sap *sap, struct sock *sk);
 extern void llc_sap_unassign_sock(struct llc_sap *sap, struct sock *sk);

net/llc/llc_main.c

@@ -71,7 +71,6 @@ struct llc_sap *llc_sap_alloc(void)
 		sap->state = LLC_SAP_STATE_ACTIVE;
 		memcpy(sap->laddr.mac, llc_main_station.mac_sa, ETH_ALEN);
 		spin_lock_init(&sap->sk_list.lock);
-		skb_queue_head_init(&sap->mac_pdu_q);
 	}
 	return sap;
 }