collab: Remove unused `api_token` field from `Config` (#56098)

This PR removes the `api_token` field from Collab's `Config`, as it is
no longer used.

Release Notes:

- N/A
367db0706bMarshall Bowers committed on 5/8/2026, 12:28:22 PM· committed by GitHubparent6aca636
5 files changedLine totals unavailable