remove this multi option

[github-actions[bot]]

remove this multi option

https://github.com/pyonair/PyonAir-pycom/blob/9b8cd7f8cb06d958981c1841ca740c9ae1cf723d/code/lib/Configuration.py#L60

        :return: values in configuration dictionary
        :rtype: dict, list of any, any
        """
        # TODO: Warn if key not in dict
        if keys is None:
            return self.configuration
        if isinstance(keys, list):
            return list(self.configuration[k] for k in keys if k in self.configuration)
            # TODO remove this multi option
        else:
            return self.configuration[keys]

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