delete
https://api.sintalk.com.br/v3/contact-lists/
Deletes the list: it stops being returned by reads, drops out of the list_ids of the contacts that were in it, and, if it was a blacklist, stops suppressing sends. The contacts themselves are kept and stay reachable on their own. The name becomes free for a new list.
Sintalk is provisioned for you and cannot be deleted; deleting it is rejected with 409.
204Contact list deleted; no body is returned.