To uninstall bve-route-cross-city-south just follow these instructions.
/ubuntu/yakkety/universe///install/index.html Birmingham Cross-City South (for OpenBVE rail simulator) Ubuntu 16.10 universe/games 1.31.08-0ubuntu2
sudo apt-get remove bve-route-cross-city-south
Which will remove just the bve-route-cross-city-south package itself.
sudo apt-get remove --auto-remove bve-route-cross-city-south
This will remove the bve-route-cross-city-south package and any other dependant packages which are no longer needed.
If you also want to delete your local/config files for bve-route-cross-city-south then this will work.
sudo apt-get purge bve-route-cross-city-south
Or similarly, like this bve-route-cross-city-south
sudo apt-get purge --auto-remove bve-route-cross-city-south
|Description||Birmingham Cross-City South (for OpenBVE rail simulator)|