cull(engine-cleanup): pass-8 phase-2 cascade round 3 after AreaSelectUI stub

SVSim.BattleEngine/Shim/UnityEngine/UnityShim.cs

@@ -134,7 +134,6 @@ namespace UnityEngine
         public void SetParent(Transform p, bool worldPositionStays) { }
         public void SetSiblingIndex(int i) { }
         public int GetSiblingIndex() => 0;
-        public void SetAsLastSibling() { }
         public Vector3 lossyScale => Vector3.one;
         public Vector3 up { get => Vector3.up; set { } }
         public Vector3 TransformPoint(Vector3 p) => p;