I don't think so, nor do I think this is solved yet. It's apparently being worked on (see
http://bugzilla.gnome.org/show_bug.cgi?id=385965, not actually manual in design, but full library synchronization), and apparently Aaron was working on it for 1.2 but since they're releasing that very soon, my guess is that it won't land quite that soon.
There used to be a plugin that would provide a manual way to clean the library of dead tracks:
http://bugzilla.gnome.org/show_bug.cgi?id=361210. But I'm guessing it doesn't work anymore.
Cheers,
Andrew