Ummm after 18 months they go away. (or right after the "release") of the EOL ones
Or how ever long they are supposed to be around.
Another friend of mine got hit by the same things last go around and whichever ones was "time over".
It pays to use LTS or KEEP MOVING ALONG
http://us.archive.ub...com/ubuntu/dists/
One last edit, showing packages:
http://packages.ubuntu.com/