To uninstall marble-dbg just follow these instructions.
sudo apt-get remove marble-dbg
This will remove just the marble-dbg package itself.
sudo apt-get remove --auto-remove marble-dbg
This will remove the marble-dbg package and any other dependant packages which are no longer needed.
If you also want to delete your local/config files for marble-dbg then this will work.
sudo apt-get purge marble-dbg
Or similarly, like this marble-dbg
sudo apt-get purge --auto-remove marble-dbg
|Maintainer||Kubuntu Developers <email@example.com>|
|Description||debugging symbols for the KDE education module applications. The Marble widget shows the earth as a sphere but does not require hardware acceleration. A minimal set of geographical data is included, so it can be used without an internet connection.|