You can uninstall or removes an installed chrony package itself from Ubuntu 16.10 (Yakkety Yak) through the terminal,
$ sudo apt-get remove chrony
If you would like to remove chrony and it's dependent packages which are no longer needed from Ubuntu,
$ sudo apt-get remove --auto-remove chrony
If you use with purge options to chrony package all the configuration and dependent packages will be removed.
$ sudo apt-get purge chrony
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 chrony