fix: remove Sonnet 3.5 from models.yml
What does this merge request do and why?
In !3600 (merged), we already removed Sonnet 3.5 as a supported model, now this can be removed from models.yml too.
Annoucement from Anthropic: https://docs.claude.com/en/docs/about-claude/model-deprecations#2025-08-13%3A-claude-sonnet-3-5-models
How to set up and validate locally
Numbered steps to set up and validate the change are strongly suggested.
Merge request checklist
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Tests added for new functionality. If not, please raise an issue to follow up. -
Documentation added/updated, if needed. -
If this change requires executor implementation: verified that issues/MRs exist for both Go executor and Node executor or confirmed that changes are backward-compatible and don't break existing executor functionality.