$ sudo apt-get remove floodlight 

Uninstall floodlight including dependent package

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

$ sudo apt-get remove --auto-remove floodlight 

Use Purging floodlight

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

$ sudo apt-get purge floodlight 

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 floodlight 

See Also,