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