$ sudo apt-get remove grafx2 

Uninstall grafx2 including dependent package

If you would like to remove grafx2 and it's dependent packages which are no longer needed from Ubuntu,

$ sudo apt-get remove --auto-remove grafx2 

Use Purging grafx2

If you use with purge options to grafx2 package all the configuration and dependent packages will be removed.

$ sudo apt-get purge grafx2 

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 grafx2 

See Also,