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