You can uninstall or removes an installed addresses-goodies-for-gnustep package itself from Ubuntu 16.04 LTS (Xenial Xerus) through the terminal,
$ sudo apt-get remove addresses-goodies-for-gnustep
If you would like to remove addresses-goodies-for-gnustep and it's dependent packages which are no longer needed from Ubuntu,
$ sudo apt-get remove --auto-remove addresses-goodies-for-gnustep
If you use with purge options to addresses-goodies-for-gnustep package all the configuration and dependent packages will be removed.
$ sudo apt-get purge addresses-goodies-for-gnustep
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 addresses-goodies-for-gnustep