dt-bindings: iio/adc: ti,palmas-gpadc: Drop incomplete example

The example for the TI Palmas ADC is incomplete as the binding is the
full PMIC, not just the sub-functions. It is preferred for MFD examples
to be complete in the top-level MFD device binding rather than piecemeal
in each sub-function binding.

This also fixes an undocumented (by schema) compatible warning for
'"ti,twl6035-pmic", "ti,palmas-pmic"'.
Signed-off-by: Rob Herring <robh@kernel.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20231128214803.3975542-1-robh@kernel.orgSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/devicetree/bindings/iio/adc/ti,palmas-gpadc.yaml

@@ -67,19 +67,4 @@ required:
   - compatible
   - "#io-channel-cells"
 
-examples:
-  - |
-    #include <dt-bindings/clock/mt8183-clk.h>
-    pmic {
-        compatible = "ti,twl6035-pmic", "ti,palmas-pmic";
-        adc {
-            compatible = "ti,palmas-gpadc";
-            interrupts = <18 0>,
-                         <16 0>,
-                         <17 0>;
-            #io-channel-cells = <1>;
-            ti,channel0-current-microamp = <5>;
-            ti,channel3-current-microamp = <10>;
-        };
-    };
 ...