collab: Remove unused `get_user_metrics_id` query (#46049)
This PR removes the unused `get_user_metrics_id` query method and the
`metrics_id` field from the `User` model.
Release Notes:
- N/A
d16c665e6dMarshall Bowers committed on 1/5/2026, 12:20:46 AM· committed by GitHubparente90a9bc