dt-bindings: input: allwinner,sun4i-a10-lrad: drop redundant type from label

dtschema defines label as string, so $ref in other bindings is
redundant.

Signed-off-by: Krzysztof Kozlowski <[email protected]>
Acked-by: Jernej Skrabec <[email protected]>
Acked-by: Rob Herring <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Dmitry Torokhov <[email protected]>

Author: krzk

Documentation/devicetree/bindings/input/allwinner,sun4i-a10-lradc-keys.yaml

@@ -49,7 +49,6 @@ patternProperties:
     $ref: input.yaml#
     properties:
       label:
-        $ref: /schemas/types.yaml#/definitions/string
         description: Descriptive name of the key
 
       linux,code: true