API call:  delete a metric resource.

        :type project: str
        :param project: ID of the project containing the metric.

        :type metric_name: str
        :param metric_name: the name of the metric

def metric_delete(self, project, metric_name):
        """API call:  delete a metric resource.

        :type project: str
        :param project: ID of the project containing the metric.

        :type metric_name: str
        :param metric_name: the name of the metric
        """
        path = "projects/%s/metrics/%s" % (project, metric_name)
        self._gapic_api.delete_log_metric(path)