USB: serial: remove bogus disconnect test in cleanup

Remove bogus (and unnecessary) test for serial->dev being NULL in
cleanup.

The device is never cleared, and cleanup is never called after a
completed disconnect anyway.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/serial/generic.c

@@ -104,12 +104,9 @@ EXPORT_SYMBOL_GPL(usb_serial_generic_open);
 
 static void generic_cleanup(struct usb_serial_port *port)
 {
-	struct usb_serial *serial = port->serial;
 	unsigned long flags;
 	int i;
 
-	if (serial->dev) {
-		/* shutdown any bulk transfers that might be going on */
 	if (port->bulk_out_size) {
 		for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i)
 			usb_kill_urb(port->write_urbs[i]);
@@ -122,7 +119,6 @@ static void generic_cleanup(struct usb_serial_port *port)
 		for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i)
 			usb_kill_urb(port->read_urbs[i]);
 	}
-	}
 }
 
 void usb_serial_generic_close(struct usb_serial_port *port)