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

[trim] fully-unreachable files deleted: 6
[trim] files edited: 55, files deleted: 0, nodes removed: 244
[type-trim] files edited: 1, types removed: 1

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

SVSim.BattleEngine/Engine/Wizard/PracticeAISettingDataSet.cs

@@ -11,9 +11,4 @@ public class PracticeAISettingDataSet
 	{
 		_dataTable = new List<PracticeAISettingData>();
 	}
-
-	public PracticeAISettingData GetSettingData(int classId, int difficulty)
-	{
-		return _dataTable.First((PracticeAISettingData d) => d.ClassId == classId && d.Difficulty == difficulty);
-	}
 }