dt-bindings: mtd: jedec, spi-nor: remove unneeded properties

After conversion the jedec,spi-nor DT schema to reference other schemas
(SPI and MTD) and use unevaluatedProperties, few properties are
redundant.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Pratyush Yadav <p.yadav@ti.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20220408063720.12826-1-krzysztof.kozlowski@linaro.org

Documentation/devicetree/bindings/mtd/jedec,spi-nor.yaml

@@ -50,10 +50,6 @@ properties:
     minItems: 1
     maxItems: 2
 
-  spi-max-frequency: true
-  spi-rx-bus-width: true
-  spi-tx-bus-width: true
-
   m25p,fast-read:
     type: boolean
     description:
@@ -74,8 +70,6 @@ properties:
       be used on such systems, to denote the absence of a reliable reset
       mechanism.
 
-  label: true
-
   partitions:
     type: object
 
@@ -99,8 +93,6 @@ examples:
         #size-cells = <0>;
 
         flash@0 {
-            #address-cells = <1>;
-            #size-cells = <1>;
             compatible = "spansion,m25p80", "jedec,spi-nor";
             reg = <0>;
             spi-max-frequency = <40000000>;