[Zirro]

I see. You are correct, I found this template: "The previous version(s) of this file are non-free. These older revisions are no longer being used in articles, and therefore fail the Wikipedia non-free content criteria. The current version will not be deleted, only its previous revisions." in the version version of the page that existed before the current one.

http://en.wikipedia.org/w/index.php?title=File:Google_Reader...

I actually find it a bit surprising that they delete the information (username, date, dimensions) related to the previous revisions, and not just the file itself in such situations.