bluetooth: make bnep_sock_cleanup() return void

bnep_sock_cleanup() always returns 0 and its return value isn't used
anywhere in the code.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/bluetooth/bnep/bnep.h

@@ -174,7 +174,7 @@ struct bnep_session {
 
 void bnep_net_setup(struct net_device *dev);
 int bnep_sock_init(void);
-int bnep_sock_cleanup(void);
+void bnep_sock_cleanup(void);
 
 static inline int bnep_mc_hash(__u8 *addr)
 {

net/bluetooth/bnep/sock.c

@@ -257,12 +257,10 @@ error:
 	return err;
 }
 
-int __exit bnep_sock_cleanup(void)
+void __exit bnep_sock_cleanup(void)
 {
 	if (bt_sock_unregister(BTPROTO_BNEP) < 0)
 		BT_ERR("Can't unregister BNEP socket");
 
 	proto_unregister(&bnep_proto);
-
-	return 0;
 }