skip the all_rated

Author: epugh

app/services/fetch_service.rb

@@ -200,7 +200,7 @@ def score_snapshot snapshot, try
     end
 
     score_data = {
-      all_rated:  [ true, false ].sample,
+      all_rated:  nil,
       queries:    queries_detail,
       score:      average_score,
       try_number: try.try_number,