Prune the users and teams

[deanwampler]

We want to upgrade our account and to control costs, we need to remove some people who are not active, so we don't pay for their "seats".

[deanwampler]

@adampingel I propose moving these team members (except you of course 😁 ) to "outside collaborators": https://github.com/orgs/The-AI-Alliance/teams/ilab-use-cases