ata: octeon: 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: Niklas Cassel <niklas.cassel@wdc.com>
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>

drivers/ata/ahci_octeon.c

@@ -73,11 +73,6 @@ static int ahci_octeon_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int ahci_octeon_remove(struct platform_device *pdev)
-{
-	return 0;
-}
-
 static const struct of_device_id octeon_ahci_match[] = {
 	{ .compatible = "cavium,octeon-7130-sata-uctl", },
 	{ /* sentinel */ }
@@ -86,7 +81,6 @@ MODULE_DEVICE_TABLE(of, octeon_ahci_match);
 
 static struct platform_driver ahci_octeon_driver = {
 	.probe          = ahci_octeon_probe,
-	.remove         = ahci_octeon_remove,
 	.driver         = {
 		.name   = "octeon-ahci",
 		.of_match_table = octeon_ahci_match,