mips: sgi-ip22: Drop redundant check from .remove()

The remove callback is only called by the driver core if there is a
driver to unbind, so there is no need to check dev->driver to be
non-NULL.

Signed-off-by: Uwe Kleine-König <[e-mail]>
Signed-off-by: Thomas Bogendoerfer <[e-mail]>

arch/mips/sgi-ip22/ip22-gio.c

···
 	struct gio_device *gio_dev = to_gio_device(dev);
 	struct gio_driver *drv = to_gio_driver(dev->driver);
 
-	if (dev->driver && drv->remove)
+	if (drv->remove)
 		drv->remove(gio_dev);
 }