To uninstall ldraw-parts just follow these instructions.
sudo apt-get remove ldraw-parts
This will remove just the ldraw-parts package itself.
sudo apt-get remove --auto-remove ldraw-parts
This will remove the ldraw-parts package and any other dependant packages which are no longer needed.
If you also want to delete your local/config files for ldraw-parts then this will work.
sudo apt-get purge ldraw-parts
Or similarly, like this ldraw-parts
sudo apt-get purge --auto-remove ldraw-parts
|Maintainer||Debian LEGO Team <firstname.lastname@example.org>|
|Description||LDraw parts library in LDraw format. This part library is needed by 3D CAD programs such as MLCAD, LeoCAD and Konstruktor which allow one to construct LEGO models from individual LDraw parts. It is also needed by rendering software such as LDView and LdGLite or instruction creation software like LPub4 or Lic.|