Create a data migration to remove all salts

[coilysiren]

after #360 is merged

[coilysiren]

This may not be a valid course of action, I'll update this issue if I figure out anything conclusive

[ktschap]

Is the idea here to migrate older salt data to a prefix format, and then remove the code that deals with it altogether? Sounds like it would save much of the code refactoring and testing in #360.

[coilysiren]

@ktschap yea that's the idea. I also realized after the fact that it would remove the need for a lot of the work in #360, yea

[coilysiren]

That said, it was reviewing #360 that gave me this idea at all!

[ktschap]

Got it. I'll leave it up to you if it makes sense to put #360 on hold for now then, let me know if I can help somehow.