platform/chrome: wilco_ec: event: remove redundant MODULE_ALIAS

There is no platform driver in the file.  Remove the redundant
MODULE_ALIAS().

Reviewed-by: Benson Leung <bleung@chromium.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240329075630.2069474-18-tzungbi@kernel.org


Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>