8139cp: removal of useless BUG_ON() check

netdev_priv() will provide a nice oops a few lines before
the BUG_ON() check.
Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>

drivers/net/8139cp.c

@@ -2009,7 +2009,6 @@ static void cp_remove_one (struct pci_dev *pdev)
 	struct net_device *dev = pci_get_drvdata(pdev);
 	struct cp_private *cp = netdev_priv(dev);
 
-	BUG_ON(!dev);
 	unregister_netdev(dev);
 	iounmap(cp->regs);
 	if (cp->wol_enabled)