At the 2016 OmniUpdate Hackathon I joined a group of six people who built a gadget that unpublishes files from the web server. The idea started out as a simple sidebar gadget that when clicked would go to the production server and remove the file while keeping it on the staging server.
After about two hours of coding the gadget was “completed”. At that point, if you unpublished a file and navigated a different page, the button was still disabled. This was a known bug and I reported it the next day. Yesterday I had sometime to fix this error and I believe the gadget is ready to be used.