Hide confusing attributes

osu.Game.Rulesets.Mania/Difficulty/ManiaPerformanceAttributes.cs

@@ -25,7 +25,6 @@ namespace osu.Game.Rulesets.Mania.Difficulty
 
             yield return new PerformanceDisplayAttribute("Difficulty", Difficulty);
             yield return new PerformanceDisplayAttribute("Accuracy", Accuracy);
-            yield return new PerformanceDisplayAttribute("Scaled Score", ScaledScore);
         }
     }
 }

osu.Game.Rulesets.Osu/Difficulty/OsuPerformanceAttributes.cs

@@ -33,7 +33,6 @@ namespace osu.Game.Rulesets.Osu.Difficulty
             yield return new PerformanceDisplayAttribute("Speed", Speed);
             yield return new PerformanceDisplayAttribute("Accuracy", Accuracy);
             yield return new PerformanceDisplayAttribute("Flashlight Bonus", Flashlight);
-            yield return new PerformanceDisplayAttribute("Effective Miss Count", EffectiveMissCount);
         }
     }
 }

osu.Game/Rulesets/Difficulty/PerformanceAttributes.cs

@@ -16,6 +16,7 @@ namespace osu.Game.Rulesets.Difficulty
 
         /// <summary>
         /// Return a <see cref="PerformanceDisplayAttribute"/> for each attribute so that a performance breakdown can be displayed.
+        /// Some attributes may be omitted if they are not meant for display.
         /// </summary>
         /// <returns></returns>
         public virtual IEnumerable<PerformanceDisplayAttribute> GetAttributesForDisplay()