Remove mr_default_title_template feature flag
Removes the mr_default_title_template feature flag. The feature is already gated by a project setting, so the flag is no longer needed.
Changes:
- Delete
config/feature_flags/beta/mr_default_title_template.yml - Remove
Feature.enabled?(:mr_default_title_template)checks from controller, model, service, API entity, and views - Update documentation to record flag removal in history
- Update specs to remove feature flag stubs and disabled-state tests
- Regenerate OpenAPI v2 docs
Related rollout issue: #594462
Edited by Kai Armstrong