How to disable Drafts in the editor?

In this thread we discussed this. Is it possible to prevent automatic restore of draft content?

I can't find how to do it though!

How disable recovery of Drafts in the editor?

Isn't that the complete post edit history? We want to retain that, for audit purposes, but remove the facility to "Restore previous content" when creating a new comment or post. We believe this is at the root of the continuing "disappearing image" issue, where ghost attachments are included in a post but the attachment itself has disappeared.