Splice remove suggesion hints when those are cleared in the editor. (#9088)

Closes https://github.com/zed-industries/zed/issues/6793

Release Notes:

- Fixed copilot suggestions not disappearing after disabling the tool
([6793](https://github.com/zed-industries/zed/issues/6793))
146971fb02Kirill Bulatov committed on 3/9/2024, 12:00:01 AM· committed by GitHubparent3471780
3 files changedLine totals unavailable