At one of my customer’s sites (EPiServer 6 r2) it was recently discovered that PDF documents are still generating Google hits, even though the pages on which they once had been published, since long have been unpublished and removed.

To prevent this must all files concerned, one by one, be deleted from File Management?

Is there a way to track down and delete files in File Management which are not linked to a published page; i.e. not in use anymore?