Deletes a metric descriptor. Only user-created
    [custom metrics](/monitoring/custom-metrics) can be deleted.

def DeleteMetricDescriptor(self, request, context):
        """Deletes a metric descriptor. Only user-created
    [custom metrics](/monitoring/custom-metrics) can be deleted.
    """
        context.set_code(grpc.StatusCode.UNIMPLEMENTED)
        context.set_details("Method not implemented!")
        raise NotImplementedError("Method not implemented!")