Question re: hooks and removing them

The Anki docs for building extensions talks about the ability to remove appended hooks using something like the following: gui_hooks.reviewer_did_show_question.remove(myfunc)

When would someone need to have this implemented? What are the benefits of removing a hook? Can anyone offer a scenario where this would be used? Thanks in advance :^)

If it only makes sense to call a hook while a given window or operation is active, you need to be able to remove the hook when that window/operation finishes.

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