$ sudo apt-get remove gnome-pie 

Uninstall gnome-pie including dependent package

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

$ sudo apt-get remove --auto-remove gnome-pie 

Use Purging gnome-pie

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

$ sudo apt-get purge gnome-pie 

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 gnome-pie 

See Also,