If handler tree is unused it may be removed

https://github.com/deep-foundation/deeplinks/blob/8aa467c95b9b6d3e41639dbc864260b13349b530/imports/core.tsx#L292-L295

This might increase insert/delete performance (for example it might speed up tests execution).

Start by reading imports/core.tsx at lines 292-295 and tracing all references to the handler tree. Run the existing tests that exercise insert and delete operations, then compare execution time before and after any change; done means the tree's removal is shown to preserve behavior and improve performance.

Written by the indexing model from the issue text.