Bug#568895: user-setup: Remove some of the default groups, they are unused now

[Frans Pop <elendil@planet.nl>]

On Monday 08 February 2010, Marco d'Itri wrote:
> But users should be in group dip (able to start a remote network
> connection) by default, not dialout (with raw access to a serial port).

I've fixed that in SVN. Thanks Marco.

> FWIW, these are the "standard" groups used by udev on all distributions
> which must alwayws exist:
> disk, cdrom, floppy, tape, audio, video, lp, tty, dialout, kmem.

Thanks, but creating the groups is not D-I's responsibility. I think that's 
done by adduser, but not sure.