$ sudo apt-get remove g15stats 

Uninstall g15stats including dependent package

If you would like to remove g15stats and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove g15stats 

Use Purging g15stats

If you use with purge options to g15stats package all the configuration and dependent packages will be removed.

$ sudo apt-get purge g15stats 

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 g15stats 

See Also,