net: dsa: rzn1-a5psw: remove unnecessary platform_set_drvdata()

Remove unnecessary platform_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/rzn1_a5psw.c

@@ -1025,8 +1025,6 @@ static int a5psw_remove(struct platform_device *pdev)
 	clk_disable_unprepare(a5psw->hclk);
 	clk_disable_unprepare(a5psw->clk);
 
-	platform_set_drvdata(pdev, NULL);
-
 	return 0;
 }