wireless: airo: 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: NJingoo Han <jg1.han@samsung.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/airo.c

@@ -5570,7 +5570,6 @@ static void airo_pci_remove(struct pci_dev *pdev)
 	airo_print_info(dev->name, "Unregistering...");
 	stop_airo_card(dev, 1);
 	pci_disable_device(pdev);
-	pci_set_drvdata(pdev, NULL);
 }
 
 static int airo_pci_suspend(struct pci_dev *pdev, pm_message_t state)