net: dsa: b53: remove unnecessary set_drvdata()

Remove unnecessary set_drvdata(NULL) function in ->remove(),
the driver_data will be set to NULL in device_unbind_cleanup()
after calling ->remove().
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/dsa/b53/b53_mdio.c

@@ -356,8 +356,6 @@ static void b53_mdio_remove(struct mdio_device *mdiodev)
 		return;
 
 	b53_switch_remove(dev);
-
-	dev_set_drvdata(&mdiodev->dev, NULL);
 }
 
 static void b53_mdio_shutdown(struct mdio_device *mdiodev)

drivers/net/dsa/b53/b53_mmap.c

@@ -316,8 +316,6 @@ static int b53_mmap_remove(struct platform_device *pdev)
 	if (dev)
 		b53_switch_remove(dev);
 
-	platform_set_drvdata(pdev, NULL);
-
 	return 0;
 }
 

drivers/net/dsa/b53/b53_srab.c

@@ -667,8 +667,6 @@ static int b53_srab_remove(struct platform_device *pdev)
 	b53_srab_intr_set(dev->priv, false);
 	b53_switch_remove(dev);
 
-	platform_set_drvdata(pdev, NULL);
-
 	return 0;
 }