To uninstall castle-game-engine-doc just follow these instructions.
sudo apt-get remove castle-game-engine-doc
This will remove just the castle-game-engine-doc package itself.
sudo apt-get remove --auto-remove castle-game-engine-doc
This will remove the castle-game-engine-doc package and any other dependant packages which are no longer needed.
If you also want to delete your local/config files for castle-game-engine-doc then this will work.
sudo apt-get purge castle-game-engine-doc
Or similarly, like this castle-game-engine-doc
sudo apt-get purge --auto-remove castle-game-engine-doc
|Maintainer||Pascal Packaging Team <email@example.com>|
|Description||Castle Game Engine - Developer's Documentation|