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/AIStyleData.cs

@@ -81,19 +81,4 @@ public class AIStyleData
 		policyDic.Add(key, list2);
 		return true;
 	}
-
-	public void MixInStyle(AIStyleData addStyle)
-	{
-		foreach (KeyValuePair<AIStyleKey, List<AIPolicyData>> pair in addStyle.policyDic)
-		{
-			if (pair.Value == null || (categoryFilter != null && !categoryFilter.Any((AICategory c) => c == pair.Key.category)))
-			{
-				continue;
-			}
-			foreach (AIPolicyData item in pair.Value)
-			{
-				MixInPolicy(pair.Key, item);
-			}
-		}
-	}
 }