You can uninstall or removes an installed libkdeedu-data package itself from Debian 8 (Jessie) through the terminal,
$ sudo apt-get remove libkdeedu-data
If you would like to remove libkdeedu-data and it's dependent packages which are no longer needed from Ubuntu,
$ sudo apt-get remove --auto-remove libkdeedu-data
If you use with purge options to libkdeedu-data package all the configuration and dependent packages will be removed.
$ sudo apt-get purge libkdeedu-data
If you use purge options along with auto remove, will be removed everything regarding the package, It's really useful when you want to reinstall again.
$ sudo apt-get purge --auto-remove libkdeedu-data