cull(engine-cleanup): pass-8 phase-2 cascade round 1 after GachaUI stub

SVSim.BattleEngine/Engine/GachaUI.cs

@@ -7,19 +7,7 @@ public class GachaUI : UIBase
     public enum CardPackType
     {
         NONE,
-        CRYSTAL_MULTI,
-        DAILY,
-        TICKET,
         TICKET_MULTI,
-        RUPY,
-        RUPY_MULTI,
-        CRYSTAL_SPECIAL,
-        CRYSTAL_SELECT_SKIN,
         FREE_PACKS,
-        FREE_PACK_WITH_SKIN,
-        ROTATION_STARTER_PACK,
-        CRYSTAL_ACQUIRE_SKIN_CARD_PACK
-    }
-
-    public static bool IsTsStepupPackId(int packId) => false;
+        FREE_PACK_WITH_SKIN    }
 }