usb: gadget: udc: pxa27x: do not call usb_gadget_unregister_driver()

that call is completely unnecessary because
usb_del_gadget_udc() already makes sure the
gadget driver is properly unregistered from
the UDC.
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/gadget/udc/pxa27x_udc.c

@@ -2501,7 +2501,6 @@ static int pxa_udc_remove(struct platform_device *_dev)
 	struct pxa_udc *udc = platform_get_drvdata(_dev);
 
 	usb_del_gadget_udc(&udc->gadget);
-	usb_gadget_unregister_driver(udc->driver);
 	pxa_cleanup_debugfs(udc);
 
 	usb_put_phy(udc->transceiver);