To uninstall xtalk just follow these instructions.
sudo apt-get remove xtalk
This will remove just the xtalk package itself.
sudo apt-get remove --auto-remove xtalk
This will remove the xtalk package and any other dependant packages which are no longer needed.
If you also want to delete your local/config files for xtalk then this will work.
sudo apt-get purge xtalk
Or similarly, like this xtalk
sudo apt-get purge --auto-remove xtalk
|Maintainer||Luis Uribe <firstname.lastname@example.org>|
|Description||BSD talk compatible X Window System client terminal to that of another user. This is an X Window System version, written in Python.|