Remove some dead code

[FelixMalfait]

We could remove a lot more than this, this is just a start.

There are various tools to help with this, knip is a good one

[greptile-apps]

PR Summary

The pull request focuses on removing dead code to clean up the codebase and reduce maintenance overhead.

• Removed ActivityBodyEffect.tsx: Ensure no dependencies on this Recoil state management component.
• Deleted activityTitleFamilyState.ts: Verify that the family state for activity titles is not used elsewhere.
• Removed targetableObjectsInDrawerState.ts: Confirm that this Recoil atom is not referenced in other parts of the codebase.
• Deleted CommentChip.tsx and related stories: Ensure no UI elements or functionality depend on the CommentChip component.
• Modified import statements and type declarations: Minor changes in various input components to correct imports and clean up type exports.

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