drm/panel: remove redundant regulator_disable()

regulator_disable() is already performed by panel_simple_disable(),
which is called by panel_simple_remove().
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

drivers/gpu/drm/panel/panel-simple.c

@@ -259,8 +259,6 @@ static int panel_simple_remove(struct device *dev)
 	if (panel->backlight)
 		put_device(&panel->backlight->dev);
 
-	regulator_disable(panel->supply);
-
 	return 0;
 }