Handle the removal of teams from an organization

[potaders]

When a team is removed or renamed within a GitHub GitHub org, handle the clean up of that team from CODEOWNERS files.

[github-actions]

This issue is stale because it has been open 21 days with no activity. Remove stale label or comment or this will be closed in 14 days.

[electriquo]

I would be happy to see that :)

@potaders Any chance that you could contribute such functionality?

[electriquo]

https://github.com/github/cleanowners/blob/211f5bfcab005f8a90b949d5d68ea867e3ed27d1/cleanowners.py#L203

Is kinda misleading, since there might be a team in the organization which was renamed/deleted. For example, if there is a CODEOWNER file in a repository within the octocat organization such as

* @octocat/no-such-team

It will be reasonable to expect that cleanowners will open a PR to remove @octocat/no-such-team.

[electriquo]

relates to #9

[github-actions]

This issue is stale because it has been open 21 days with no activity. Remove stale label or comment or this will be closed in 14 days.

[electriquo]

please do not auto close the issue

[github-actions]

This issue is stale because it has been open 21 days with no activity. Remove stale label or comment or this will be closed in 14 days.

[electriquo]

please do not auto close the issue