Removing deprecated models:
- MiMo V2 and MiMo V2 Omni as per
https://github.com/anomalyco/models.dev/commit/4bdb1951786447096e6683fb81d6f9379e3e7a7b
- Hy3 as per
https://github.com/anomalyco/models.dev/commit/2cb38326185daece07f295061ec8ec2d640e064c
- Claude 3.5 Haiku as per
https://github.com/anomalyco/models.dev/commit/ea205913ceb857d6f85c0d201683d5181fda8d69

Self-Review Checklist:

- [x] I've reviewed my own diff for quality, security, and reliability
- [x] Unsafe blocks (if any) have justifying comments
- [x] The content is consistent with the [UI/UX
checklist](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)
- [ ] Tests cover the new/changed behavior
- [x] Performance impact has been considered and is acceptable

Release Notes:

- OpenCode: removed deprecated models (MiMo V2, Hy3, and Claude 3.5
Haiku)