$ sudo apt-get remove filelight 

Uninstall filelight including dependent package

If you would like to remove filelight and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove filelight 

Use Purging filelight

If you use with purge options to filelight package all the configuration and dependent packages will be removed.

$ sudo apt-get purge filelight 

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 filelight 

See Also,