platform/x86: lg-laptop: Drop debug-only ACPI notify handler

platform/x86: lg-laptop: Drop debug-only ACPI notify handler

To facilitate subsequent conversion of the driver to using struct
platform_driver instead of struct acpi_driver, drop the debug-only
notify handler method from the driver.

No intentional functional impact beyond debug.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/3346280.5fSG56mABF@rafael.j.wysocki
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>