The acpi_subysystem_id is only written and freed, not read, so
unnecessary.
Signed-off-by: Gergo Koteles <soyer@irl.hu>
Link: https://lore.kernel.org/r/454639336be28d2b50343e9c8366a56b0975e31d.1707456753.git.soyer@irl.huSigned-off-by: Mark Brown <broonie@kernel.org>