To uninstall xbs just follow these instructions.
sudo apt-get remove xbs
This will remove just the xbs package itself.
sudo apt-get remove --auto-remove xbs
This will remove the xbs package and any other dependant packages which are no longer needed.
If you also want to delete your local/config files for xbs then this will work.
sudo apt-get purge xbs
Or similarly, like this xbs
sudo apt-get purge --auto-remove xbs
|Maintainer||Matthew Vernon <firstname.lastname@example.org>|
|Description||3-d models and movies of molecules and moving three dimensional models of molecules. X11 and PostScript output are available. Models can be rotated, scaled, etc. Various labeling, shading, lighting, coloring options are available.|