ACPI: remove unused acpi_device_ops .shutdown method

No drivers use the .shutdown method, so remove it.
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>

drivers/acpi/scan.c

@@ -395,22 +395,10 @@ static int acpi_device_remove(struct device * dev)
 	return 0;
 }
 
-static void acpi_device_shutdown(struct device *dev)
-{
-	struct acpi_device *acpi_dev = to_acpi_device(dev);
-	struct acpi_driver *acpi_drv = acpi_dev->driver;
-
-	if (acpi_drv && acpi_drv->ops.shutdown)
-		acpi_drv->ops.shutdown(acpi_dev);
-
-	return ;
-}
-
 struct bus_type acpi_bus_type = {
 	.name		= "acpi",
 	.suspend	= acpi_device_suspend,
 	.resume		= acpi_device_resume,
-	.shutdown	= acpi_device_shutdown,
 	.match		= acpi_bus_match,
 	.probe		= acpi_device_probe,
 	.remove		= acpi_device_remove,

include/acpi/acpi_bus.h

@@ -95,7 +95,6 @@ typedef int (*acpi_op_suspend) (struct acpi_device * device,
 typedef int (*acpi_op_resume) (struct acpi_device * device);
 typedef int (*acpi_op_bind) (struct acpi_device * device);
 typedef int (*acpi_op_unbind) (struct acpi_device * device);
-typedef int (*acpi_op_shutdown) (struct acpi_device * device);
 
 struct acpi_bus_ops {
 	u32 acpi_op_add:1;
@@ -121,7 +120,6 @@ struct acpi_device_ops {
 	acpi_op_resume resume;
 	acpi_op_bind bind;
 	acpi_op_unbind unbind;
-	acpi_op_shutdown shutdown;
 };
 
 struct acpi_driver {