ASoC: Remove mt6359_platform_driver_remove

remove mt6359_platform_driver_remove due to it is
useless.

Signed-off-by: Shane.Chien <shane.chien@mediatek.com>
Link: https://lore.kernel.org/r/1605068096-12587-1-git-send-email-shane.chien@mediatek.com


Signed-off-by: Mark Brown <broonie@kernel.org>