rsxx: Drop PCI legacy power management

The rsxx driver doesn't support device suspend, so remove
rsxx_pci_suspend(), the legacy PCI .suspend() method, completely.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20211208192449.146076-5-helgaas@kernel.orgSigned-off-by: Jens Axboe <axboe@kernel.dk>

drivers/block/rsxx/core.c

@@ -1037,12 +1037,6 @@ static void rsxx_pci_remove(struct pci_dev *dev)
 	kfree(card);
 }
 
-static int rsxx_pci_suspend(struct pci_dev *dev, pm_message_t state)
-{
-	/* We don't support suspend at this time. */
-	return -ENOSYS;
-}
-
 static void rsxx_pci_shutdown(struct pci_dev *dev)
 {
 	struct rsxx_cardinfo *card = pci_get_drvdata(dev);
@@ -1083,7 +1077,6 @@ static struct pci_driver rsxx_pci_driver = {
 	.id_table	= rsxx_pci_ids,
 	.probe		= rsxx_pci_probe,
 	.remove		= rsxx_pci_remove,
-	.suspend	= rsxx_pci_suspend,
 	.shutdown	= rsxx_pci_shutdown,
 	.err_handler    = &rsxx_err_handler,
 };