Removed unused method

Assets/CardEffect/BT21/White/BT21_102.cs

@@ -1,5 +1,6 @@
 using System.Collections;
 using System.Collections.Generic;
+using System.Linq;
 
 // Tai Kamiya
 namespace DCGO.CardEffects.BT21
@@ -76,15 +77,14 @@ namespace DCGO.CardEffects.BT21
 
                 bool CanSelectDigimon(CardSource source)
                     => source.IsDigimon
-                    && source.BasePlayCostFromEntity <= AdjustedPlayCostMax()
+                    && source.BasePlayCostFromEntity <= AdjustedPlayCostMax(source)
                     && (source.HasAdventureTraits || source.HasHeroTraits);
 
-                bool IsTamerOnField(Permanent permanent)
-                    => CardEffectCommons.IsPermanentExistsOnOwnerBattleArea(permanent, card)
-                    && permanent.IsTamer;
-
-                int AdjustedPlayCostMax()
-                    => 2 + CardEffectCommons.GetColourCountOnOwnerBattleArea(card, IsTamerOnField);
+                int AdjustedPlayCostMax(CardSource cardSource)
+                {
+                    var tamers = cardSource.Owner.GetBattleAreaPermanents().Filter(x => x.IsTamer).Select(x => x.TopCard).ToList();
+                    return 2 + Combinations.GetDifferenetColorCardCount(tamers);
+                }
 
                 IEnumerator ActivateCoroutine(Hashtable hashtable)
                 {

Assets/Scripts/CardEffectCommons/GameContextDeterminarion.cs

@@ -526,15 +526,4 @@ public partial class CardEffectCommons
     }
 
     #endregion
-
-    #region Get multi colour count from permanents in owners battle area
-
-    public static int GetColourCountOnOwnerBattleArea(CardSource card, Func<Permanent, bool> canGetCardColour) =>
-        card.Owner.GetBattleAreaPermanents()
-        .Filter(x => canGetCardColour(x))
-        .Select(x => x.TopCard)
-        .SelectMany(x => x.CardColors)
-        .ToList().Count;
-
-    #endregion
 }