def delete_review_request(self, reviewers=github.GithubObject.NotSet, team_reviewers=github.GithubObject.NotSet):
        """
        :calls: `DELETE /repos/:owner/:repo/pulls/:number/requested_reviewers <https://developer.github.com/v3/pulls/review_requests/>`_
        :param reviewers: list of strings
        :param team_reviewers: list of strings
        :rtype: None
        """
        post_parameters = dict()
        if reviewers is not github.GithubObject.NotSet:
            assert all(isinstance(element, (str, unicode)) for element in reviewers), reviewers
            post_parameters["reviewers"] = reviewers
        if team_reviewers is not github.GithubObject.NotSet:
            assert all(isinstance(element, (str, unicode)) for element in team_reviewers), team_reviewers
            post_parameters["team_reviewers"] = team_reviewers
        headers, data = self._requester.requestJsonAndCheck(
            "DELETE",
            self.url + "/requested_reviewers",
            input=post_parameters
        )
:calls: `DELETE /repos/:owner/:repo/pulls/:number/requested_reviewers <https://developer.github.com/v3/pulls/review_requests/>`_
        :param reviewers: list of strings
        :param team_reviewers: list of strings
        :rtype: None