Clean up language model selector (#26134)

This PR does some cleanup for the language model selector after
https://github.com/zed-industries/zed/pull/26090.

Release Notes:

- N/A
728c161e8dMarshall Bowers committed on 3/5/2025, 4:18:01 PM· committed by GitHubparent3975d8e
5 files changedLine totals unavailable