collab: Remove Supermaven API key issuance (#46044)
This PR removes the ability to retrieve a Supermaven API key from
Collab.
This was staff-gated (at least, on the server), and judging by the logs,
no one is using it.
Release Notes:
- N/A
d492b48f32Marshall Bowers committed on 1/4/2026, 11:28:18 PM· committed by GitHubparent2457264