DeletePullRequestStatus.
        [Preview API] Delete pull request status.
        :param str repository_id: The repository ID of the pull request’s target branch.
        :param int pull_request_id: ID of the pull request.
        :param int status_id: ID of the pull request status.
        :param str project: Project ID or project name

def delete_pull_request_status(self, repository_id, pull_request_id, status_id, project=None):
        """DeletePullRequestStatus.
        [Preview API] Delete pull request status.
        :param str repository_id: The repository ID of the pull request’s target branch.
        :param int pull_request_id: ID of the pull request.
        :param int status_id: ID of the pull request status.
        :param str project: Project ID or project name
        """
        route_values = {}
        if project is not None:
            route_values['project'] = self._serialize.url('project', project, 'str')
        if repository_id is not None:
            route_values['repositoryId'] = self._serialize.url('repository_id', repository_id, 'str')
        if pull_request_id is not None:
            route_values['pullRequestId'] = self._serialize.url('pull_request_id', pull_request_id, 'int')
        if status_id is not None:
            route_values['statusId'] = self._serialize.url('status_id', status_id, 'int')
        self._send(http_method='DELETE',
                   location_id='b5f6bb4f-8d1e-4d79-8d11-4c9172c99c35',
                   version='5.1-preview.1',
                   route_values=route_values)