scripts: set_maintainer: do not re-add self-removed reviewers

    # one liner PRs should be trivial

    if pr.commits == 1 and (pr.additions <= 1 and pr.deletions <= 1) and not manifest_change:

        labels = {'trivial'}

        labels = {'Trivial'}

    if len(fn) > 500:

        log(f"Too many files changed ({len(fn)}), skipping....")

            existing_reviewers |= set(r.get_page(page))

            page += 1

        for c in collab:

        # check for reviewers that remove themselves from list of reviewer and

        # do not attempt to add them again based on MAINTAINERS file.

        self_removal = []

        for event in pr.get_issue_events():

            if event.event == 'review_request_removed' and event.actor == event.requested_reviewer:

                self_removal.append(event.actor)

        for collaborator in collab:

            try:

                u = gh.get_user(c)

                if pr.user != u and gh_repo.has_in_collaborators(u):

                    if u not in existing_reviewers:

                        reviewers.append(c)

                gh_user = gh.get_user(collaborator)

                if pr.user != gh_user and gh_repo.has_in_collaborators(gh_user):

                    if gh_user not in existing_reviewers and gh_user not in self_removal:

                        reviewers.append(collaborator)

            except UnknownObjectException as e:

                log(f"Can't get user '{c}', account does not exist anymore? ({e})")

                log(f"Can't get user '{collaborator}', account does not exist anymore? ({e})")

        if len(existing_reviewers) < 15:

            reviewer_vacancy = 15 - len(existing_reviewers)