serial: arc_uart: Drop empty platform remove function

A remove callback just returning 0 is equivalent to no remove callback
at all. So drop the useless function.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20221212212037.3773636-1-u.kleine-koenig@pengutronix.deSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/arc_uart.c

@@ -631,12 +631,6 @@ static int arc_serial_probe(struct platform_device *pdev)
 	return uart_add_one_port(&arc_uart_driver, &arc_uart_ports[dev_id].port);
 }
 
-static int arc_serial_remove(struct platform_device *pdev)
-{
-	/* This will never be called */
-	return 0;
-}
-
 static const struct of_device_id arc_uart_dt_ids[] = {
 	{ .compatible = "snps,arc-uart" },
 	{ /* Sentinel */ }
@@ -645,7 +639,6 @@ MODULE_DEVICE_TABLE(of, arc_uart_dt_ids);
 
 static struct platform_driver arc_platform_driver = {
 	.probe = arc_serial_probe,
-	.remove = arc_serial_remove,
 	.driver = {
 		.name = DRIVER_NAME,
 		.of_match_table  = arc_uart_dt_ids,