docs: 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
          )