Comment 4 for bug 1036468

In 0.1 this function was meant to remove all .trophy files and their signatures that used an outdated extra-information when the user has changed the credentials he uses. For 0.2 we decided we'll *never* remove any .trophy files, and therefore the body of this function is gone. The function itself (and reference to it in the viewer) is still present, because we suspected we may want to use it in some other way, e.g. setting a flag inside the .trophy file, or something else. Since we don't do this, I guess we're free to get rid of it.