rfcomm: get rid of mentioning TIOC[SG]SERIAL

no support there

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

net/bluetooth/rfcomm/tty.c

@@ -839,14 +839,6 @@ static int rfcomm_tty_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned l
 		BT_DBG("TIOCMIWAIT");
 		break;
 
-	case TIOCGSERIAL:
-		BT_ERR("TIOCGSERIAL is not supported");
-		return -ENOIOCTLCMD;
-
-	case TIOCSSERIAL:
-		BT_ERR("TIOCSSERIAL is not supported");
-		return -ENOIOCTLCMD;
-
 	case TIOCSERGSTRUCT:
 		BT_ERR("TIOCSERGSTRUCT is not supported");
 		return -ENOIOCTLCMD;