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