All of the examples for unsubscribing a REST HOOK, including the code generated from the form based app, show the function returning a value, for instance:
https://github.com/zapier/zapier-platform/blob/master/example-apps/rest-hooks/triggers/recipe.js
Unfortunately all of the examples merely show passing through the return from the web request without any particular detail and as far as I can find it is nowhere documented what the upstream code *expects* to be returned here or what the implications of various options are.
Does the the return value of this function actually do anything?