usb: gadget: net2280: remove unnecessary pci_set_drvdata()

The driver core clears the driver data to NULL after device_release
or on probe failure. Thus, it is not needed to manually clear the
device driver data to NULL.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/gadget/net2280.c

@@ -2680,7 +2680,6 @@ static void net2280_remove (struct pci_dev *pdev)
 	if (dev->enabled)
 		pci_disable_device (pdev);
 	device_remove_file (&pdev->dev, &dev_attr_registers);
-	pci_set_drvdata (pdev, NULL);
 
 	INFO (dev, "unbind\n");
 }