API: hide duplicated difficulty

API/src/main/java/cc/fascinated/model/score/ScoreResponse.java

@@ -83,11 +83,6 @@ public class ScoreResponse {
      */
     private Double accuracy;
 
-    /**
-     * The difficulty the score was set on.
-     */
-    private String difficulty;
-
     /**
      * The timestamp of the score.
      */

API/src/main/java/cc/fascinated/services/TrackedScoreService.java

@@ -91,7 +91,6 @@ public class TrackedScoreService {
                     trackedScore.getBadCuts(),
                     trackedScore.getMaxCombo(),
                     trackedScore.getAccuracy(),
-                    trackedScore.getDifficulty(),
                     trackedScore.getTimestamp()
             ));
         }