cull(engine-cleanup): pass-8 phase-2 cascade round 2

[trim] fully-unreachable files deleted: 3
[trim] files edited: 21, files deleted: 0, nodes removed: 38
[type-trim] files edited: 3, types removed: 3

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

SVSim.BattleEngine/Engine/Wizard/AIPolicyData.cs

@@ -102,22 +102,6 @@ public class AIPolicyData
 		};
 	}
 
-	public static AICategory ConvertClassIDToCategory(int id)
-	{
-		return id switch
-		{
-			1 => AICategory.ELF, 
-			2 => AICategory.ROYAL, 
-			3 => AICategory.WITCH, 
-			4 => AICategory.DRAGON, 
-			5 => AICategory.NECROMANCE, 
-			6 => AICategory.VAMPIRE, 
-			7 => AICategory.BISHOP, 
-			8 => AICategory.NEMESIS, 
-			_ => AICategory.ALL, 
-		};
-	}
-
 	public bool CheckCondition(AIVirtualCard owner, List<int> playPtn, AIVirtualField field, AISituationInfo situation)
 	{
 		return _conditionExpr.CheckCondition(owner, playPtn, field, situation);