From the Corvid reference page for RatingsDisplay:
"To reset the ratings display element, restoring it to the empty state, set the rating property to null or undefined."
From the console when I do the above:
"Wix code SDK Warning: The rating parameter that is passed to the rating method cannot be set to null or undefined.Submission ManagerLine 213"
So... how do I set the ratings display to have all the starts empty without getting yelled at?