net: dsa: sja1105: remove unnecessary spi_set_drvdata()

Remove unnecessary spi_set_drvdata() 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/sja1105/sja1105_main.c

@@ -3351,8 +3351,6 @@ static void sja1105_remove(struct spi_device *spi)
 		return;
 
 	dsa_unregister_switch(priv->ds);
-
-	spi_set_drvdata(spi, NULL);
 }
 
 static void sja1105_shutdown(struct spi_device *spi)