DeleteProcessWorkItemType.
        [Preview API] Removes a work itewm type in the process.
        :param str process_id: The ID of the process.
        :param str wit_ref_name: The reference name of the work item type.

def delete_process_work_item_type(self, process_id, wit_ref_name):
        """DeleteProcessWorkItemType.
        [Preview API] Removes a work itewm type in the process.
        :param str process_id: The ID of the process.
        :param str wit_ref_name: The reference name of the work item type.
        """
        route_values = {}
        if process_id is not None:
            route_values['processId'] = self._serialize.url('process_id', process_id, 'str')
        if wit_ref_name is not None:
            route_values['witRefName'] = self._serialize.url('wit_ref_name', wit_ref_name, 'str')
        self._send(http_method='DELETE',
                   location_id='e2e9d1a6-432d-4062-8870-bfcb8c324ad7',
                   version='5.0-preview.2',
                   route_values=route_values)