To uninstall xxdiff-scripts just follow these instructions.
sudo apt-get remove xxdiff-scripts
This will remove just the xxdiff-scripts package itself.
sudo apt-get remove --auto-remove xxdiff-scripts
This will remove the xxdiff-scripts package and any other dependant packages which are no longer needed.
If you also want to delete your local/config files for xxdiff-scripts then this will work.
sudo apt-get purge xxdiff-scripts
Or similarly, like this xxdiff-scripts
sudo apt-get purge --auto-remove xxdiff-scripts
|Maintainer||Florian Schlichting <firstname.lastname@example.org>|
|Description||graphical file/directory comparison and merge tool - scripts files, or two directories, and can be used to produce a merged version. The texts of the two or three files are presented side by side with their differences highlighted with colors for easy identification.|