dt-bindings: iio: adc: Drop Patrick Vasseur

Emails to Patrick Vasseur bounce ("Unknown To address").
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220816125401.70317-3-krzysztof.kozlowski@linaro.orgSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/devicetree/bindings/iio/adc/adi,ad7923.yaml

@@ -8,7 +8,6 @@ title: Analog Devices AD7923 and similars with 4 and 8 Channel ADCs.
 
 maintainers:
   - Michael Hennerich <michael.hennerich@analog.com>
-  - Patrick Vasseur <patrick.vasseur@c-s.fr>
 
 description: |
   Analog Devices AD7904, AD7914, AD7923, AD7924 4 Channel ADCs, and AD7908,