To uninstall x3270 just follow these instructions.
sudo apt-get remove x3270
This will remove just the x3270 package itself.
sudo apt-get remove --auto-remove x3270
This will remove the x3270 package and any other dependant packages which are no longer needed.
If you also want to delete your local/config files for x3270 then this will work.
sudo apt-get purge x3270
Or similarly, like this x3270
sudo apt-get purge --auto-remove x3270
|Maintainer||Bastian Blank <firstname.lastname@example.org>|
|Description||X11 program for telnet sessions to IBM mainframes window. It can also connect to an IBM AS/400 as a 5250 terminal using the AS/400's 3270 emulation. The window created by x3270 can use its own font for displaying characters, so it is a fairly accurate representation of an IBM 3278 or 3279.|