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