ASoC: mt6359: remove unused property for mt6359

This reverts commit 08651373.
("dt-bindings: mediatek: mt6359: Add new property for mt6359")

Remove unused property "LDO_VAUD18-supply" in mt6359codec.

Signed-off-by: Jiaxin Yu <jiaxin.yu@mediatek.com>
Link: https://lore.kernel.org/r/1605841573-1442-3-git-send-email-jiaxin.yu@mediatek.com


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