You cannot delete files from that list. It is simply a listing of what you are sharing on Limewire (more or less)
If you go to the Limewire Library you will see what you are sharing and these files can be "removed from share" ...or deleted.
WARNING ..IF YOU USE THE DELETE FUNCTION they are removed imediately and totally from your hard drive. They do not go to the trash or recycle bin.
The changes may not show up until you re-start iTunes and/or Limewire.
I hope this helps
