alt Hacker NewsI've never been in the position that I've had to deal with this. Is the best you can do in this situation to pull the files and optionally republish them to a robots.txt'd path (with authn/z, too)? I can't imagine you can get it pulled from search engines very quickly...
There's a way to submit a request with Google ticket content taken down and then the easiest way would be probably to do a no index in the header response for future content