Well, unfortunately, I don't have a solution for that, but in the computer world, you know... we even have ctrl-z !
But when things are uploaded to external server or repository, it's not that easy. Until git.
I accidentally pushed a 600Mb file to a git repo that (luckily) never changed, but when I cloned the repo, I had to wait for several minutes until git downloaded the 30+ Mb file (git, or at least github compress files).
With just theese lines, you can pretend you never uploaded it. The only thing to keep in mind is that you should work on a up to date working copy.git filter-branch -f --index-filter 'git update-index --remove filename' HEAD
git push --force --verbose --dry-run
git push --force
Now you could even convince Winston Smith in room 101 that a given file never existed.
Scared? Yeah, you should be.