"Flush" Site

I have raised this in another thread. But didn't get any feedback.

With the new assets module in mind. Sometimes when building a site, you don't know how content and buckets are going to pan out. Also, you may use dummy content which you don't want the client seeing.

Would a "Flush" style function be a good addition, where you clear the undo stack and unused, non-library assets before a site goes live?

Conceivably this function should only be seen by the site developer account and not other editors or admins.