net: dsa: microchip: 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/microchip/ksz8863_smi.c

@@ -180,8 +180,6 @@ static void ksz8863_smi_remove(struct mdio_device *mdiodev)
 
 	if (dev)
 		ksz_switch_remove(dev);
-
-	dev_set_drvdata(&mdiodev->dev, NULL);
 }
 
 static void ksz8863_smi_shutdown(struct mdio_device *mdiodev)

drivers/net/dsa/microchip/ksz_spi.c

@@ -107,8 +107,6 @@ static void ksz_spi_remove(struct spi_device *spi)
 
 	if (dev)
 		ksz_switch_remove(dev);
-
-	spi_set_drvdata(spi, NULL);
 }
 
 static void ksz_spi_shutdown(struct spi_device *spi)