ACPI / scan: remove unused LIST_HEAD(acpi_device_list)

The acpi_device_list list is not used, so removed it.

[rjw: Changelog]
Signed-off-by: Haicheng Li <haicheng.li@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/acpi/scan.c

@@ -35,7 +35,6 @@ bool acpi_force_hot_remove;
 
 static const char *dummy_hid = "device";
 
-static LIST_HEAD(acpi_device_list);
 static LIST_HEAD(acpi_bus_id_list);
 static DEFINE_MUTEX(acpi_scan_lock);
 static LIST_HEAD(acpi_scan_handlers_list);