I'm guessing you used samba to share the folders. Try looking at your smb.conf
Code:
gksudo gedit /etc/samba/smb.conf
Look at the end and see if your shares are in there, if they are then you can just remove the one line.
If not, open Nautilus right click on your Desktop folder go to the share tab and remove the share, this should get rid of one. If nothing shows up, then try starting nautilus as root
repeat above.