Hi @chris.howard ,
Welcome to the Auth0 Community!
Unfortunately, we currently do not support deleting or removing Teams. The only way to get rid of one is by asking someone else from the Team to remove the account as a member. If the account is also the only Team member, then invite another throwaway account as a member and then remove the main account with that throwaway account.
We recommend checking this article that also contains information on deleting a tenant in the context of teams: Tenant Created by Mistake - How to Delete a Tenant in the Context of Teams
Please feel free to reach out if you need more help.
Thanks,
Timotei