DeleteServiceDefinition.
        [Preview API]
        :param str service_type:
        :param str identifier:

def delete_service_definition(self, service_type, identifier):
        """DeleteServiceDefinition.
        [Preview API]
        :param str service_type:
        :param str identifier:
        """
        route_values = {}
        if service_type is not None:
            route_values['serviceType'] = self._serialize.url('service_type', service_type, 'str')
        if identifier is not None:
            route_values['identifier'] = self._serialize.url('identifier', identifier, 'str')
        self._send(http_method='DELETE',
                   location_id='d810a47d-f4f4-4a62-a03f-fa1860585c4c',
                   version='5.0-preview.1',
                   route_values=route_values)