usb: kobil_sct kill urb cleanup

- usb_kill_urb() cleanup
Signed-off-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/serial/kobil_sct.c

@@ -353,7 +353,6 @@ static void kobil_close (struct usb_serial_port *port, struct file *filp)
 		usb_free_urb( port->write_urb );
 		port->write_urb = NULL;
 	}
-	if (port->interrupt_in_urb)
 	usb_kill_urb(port->interrupt_in_urb);
 }