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