$ sudo apt-get remove diodon-plugins 

Uninstall diodon-plugins including dependent package

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

$ sudo apt-get remove --auto-remove diodon-plugins 

Use Purging diodon-plugins

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

$ sudo apt-get purge diodon-plugins 

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 diodon-plugins 

See Also,