[FR] Clean Aosr in file

[hyungtaecf]

Motivation: I want to seamlessly transfer many decks of mine to my friend, but I couldn't find any easy way to do that but to remove all the tags manually.

It would be nice to have a feature to clean the file at once. It would be also nice to have this option for "selected files", so someone that has a system of one question per note would have a better time.