I don't think you can. Delete the icon from your computer and create an icon just for Editor and you won't see it any longer. The two are slightly tied together but can each be used independently. To create an icon go to the .exe for editor, do a right click and send to desktop. Happy New Year.
Just don't use it.
In the 'Save as' dialog, uncheck the option to save in the organizer.
In the preferences, uncheck all automatic process; in the organizer, file menu, disable any 'watched folder'.
It's funny that so many users who like the organizer philosophy are using Lightroom (same philosophy) and PSE editor, completely ignoring the organizer .