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

Documentation/devicetree/bindings/sound/mt6359.yaml

@@ -17,11 +17,6 @@ description: |
   Must be a child node of PMIC wrapper.
 
 properties:
-  LDO_VAUD18-supply:
-    $ref: /schemas/types.yaml#/definitions/phandle
-    description: |
-      Regulator of LDO VAUD18 at 1.8V.
-
   mediatek,dmic-mode:
     $ref: /schemas/types.yaml#/definitions/uint32
     description: |
@@ -54,15 +49,11 @@ properties:
     description: |
       Specifies the type of mic type connected to adc2
 
-required:
-  - LDO_VAUD18-supply
-
 additionalProperties: false
 
 examples:
   - |
     mt6359codec: mt6359codec {
-      LDO_VAUD18-supply = <&mt6359p_vaud18_reg>;
       mediatek,dmic-mode = <0>;
       mediatek,mic-type-0 = <2>;
     };