/home/user # apt-cache policy ndg
ndg:
Installed: (none)
Candidate: 2.0.1-5
Version table:
2.0.1-5 0
500 http://repository.maemo.org fremantle/free Packages
100 /var/lib/dpkg/status
2.0.1-4 0
500 http://repository.maemo.org fremantle/free Packages
2.0.1-3 0
500 http://repository.maemo.org fremantle/free Packages
2.0.1-2 0
500 http://repository.maemo.org fremantle/free Packages
2.0.1-1 0
500 http://repository.maemo.org fremantle/free Packages

W: Duplicate sources.list entry http://repository.maemo.org fremantle-1.3/free Packages (/var/lib/apt/lists/repository.maemo.org_extras_dists_fremantle-1.3_free_binary-armel_Packages)
W: Duplicate sources.list entry http://repository.maemo.org fremantle-1.3/non-free Packages (/var/lib/apt/lists/repository.maemo.org_extras_dists_fremantle-1.3_non-free_binary-armel_Packages)

/home/user # delgroup ndg
Removing group `ndg' ...
Klaar.

/home/user # apt-get autoremove
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.
/home/user #