To uninstall education-lang-da-desktop just follow these instructions.
/debian/stretch/main///install/index.html Debian Edu Desktop applications for Danish installs Debian 9.0 metapackages 1.924
sudo apt-get remove education-lang-da-desktop
Which will remove just the education-lang-da-desktop package itself.
sudo apt-get remove --auto-remove education-lang-da-desktop
This will remove the education-lang-da-desktop package and any other dependant packages which are no longer needed.
If you also want to delete your local/config files for education-lang-da-desktop then this will work.
sudo apt-get purge education-lang-da-desktop
Or similarly, like this education-lang-da-desktop
sudo apt-get purge --auto-remove education-lang-da-desktop
|Maintainer||Debian Edu Developers |
|Description||Debian Edu Desktop applications for Danish installs|