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

SVSim.BattleEngine/Engine/Wizard/UIUtil.cs

@@ -106,19 +106,6 @@ public static class UIUtil
 		}
 	}
 
-	public static bool IsValidIdDigits(string idString, int numOfDigits)
-	{
-		if (idString.Length != numOfDigits)
-		{
-			return false;
-		}
-		if (!int.TryParse(idString, out var result))
-		{
-			return false;
-		}
-		return result >= 0;
-	}
-
 	public static string CreateListText(IList<string> list, string separator, string header = null, string footer = null)
 	{
 		StringBuilder tempStringBuilder = GetTempStringBuilder();