leds: leds-ns2: remove unnecessary platform_set_drvdata()

The driver core clears the driver data to NULL after device_release
or on probe failure, since commit 0998d063
(device-core: Ensure drvdata = NULL when no driver is bound).
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: Bryan Wu <cooloney@gmail.com>

drivers/leds/leds-ns2.c

@@ -374,8 +374,6 @@ static int ns2_led_remove(struct platform_device *pdev)
 	for (i = 0; i < priv->num_leds; i++)
 		delete_ns2_led(&priv->leds_data[i]);
 
-	platform_set_drvdata(pdev, NULL);
-
 	return 0;
 }