To uninstall checkpw just follow these instructions.
sudo apt-get remove checkpw
This will remove just the checkpw package itself.
sudo apt-get remove --auto-remove checkpw
This will remove the checkpw package and any other dependant packages which are no longer needed.
If you also want to delete your local/config files for checkpw then this will work.
sudo apt-get purge checkpw
Or similarly, like this checkpw
sudo apt-get purge --auto-remove checkpw
|Maintainer||Gerrit Pape <firstname.lastname@example.org>|
|Description||checks password which is stored in ~/Maildir/.password|