dt-bindings: w1-gpio: Drop redundant 'maxItems'

Drop another redundant maxItems that snuck into w1-gpio binding.

If a property has an 'items' list, then a 'minItems' or 'maxItems' with the
same size as the list is redundant and can be dropped. Note that is DT
schema specific behavior and not standard json-schema behavior. The tooling
will fixup the final schema adding any unspecified minItems/maxItems.

Fixes: dd2c898b ("dt-bindings: w1: Convert 1-Wire GPIO binding to a schema")
Cc: Daniel Mack <zonque@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/w1/w1-gpio.yaml

@@ -15,7 +15,6 @@ properties:
 
   gpios:
     minItems: 1
-    maxItems: 2
     items:
       - description: Data I/O pin
       - description: Enable pin for an external pull-up resistor