ACPI: remove unused acpi_is_child_device()

Signed-off-by: Len Brown <len.brown@intel.com>

drivers/acpi/scan.c

@@ -1160,20 +1160,6 @@ static int acpi_bus_remove(struct acpi_device *dev, int rmdevice)
 	return 0;
 }
 
-static int
-acpi_is_child_device(struct acpi_device *device,
-			int (*matcher)(struct acpi_device *))
-{
-	int result = -ENODEV;
-
-	do {
-		if (ACPI_SUCCESS(matcher(device)))
-			return AE_OK;
-	} while ((device = device->parent));
-
-	return result;
-}
-
 static int
 acpi_add_single_object(struct acpi_device **child,
 		       struct acpi_device *parent, acpi_handle handle, int type,