To uninstall dict-gazetteer2k-counties just follow these instructions.
/debian/stretch/main///install/index.html Counties Database for the 2000 US Gazetteer Debian 9.0 text 1.0.0-5.3
sudo apt-get remove dict-gazetteer2k-counties
Which will remove just the dict-gazetteer2k-counties package itself.
sudo apt-get remove --auto-remove dict-gazetteer2k-counties
This will remove the dict-gazetteer2k-counties package and any other dependant packages which are no longer needed.
If you also want to delete your local/config files for dict-gazetteer2k-counties then this will work.
sudo apt-get purge dict-gazetteer2k-counties
Or similarly, like this dict-gazetteer2k-counties
sudo apt-get purge --auto-remove dict-gazetteer2k-counties
|Description||Counties Database for the 2000 US Gazetteer|