To uninstall unity-scope-scopes just follow these instructions.
/ubuntu/vivid/universe///install/index.html A scope for browsing Unity scopes Ubuntu 15.04 universe/gnome 0.1+14.10.20140820-0ubuntu1
sudo apt-get remove unity-scope-scopes
Which will remove just the unity-scope-scopes package itself.
sudo apt-get remove --auto-remove unity-scope-scopes
This will remove the unity-scope-scopes package and any other dependant packages which are no longer needed.
If you also want to delete your local/config files for unity-scope-scopes then this will work.
sudo apt-get purge unity-scope-scopes
Or similarly, like this unity-scope-scopes
sudo apt-get purge --auto-remove unity-scope-scopes
|Description||A scope for browsing Unity scopes|