BETA: Minor cleanup.

Reported by: SouLakoS

L2J_DataPack_BETA/dist/game/data/scripts.cfg

@@ -117,7 +117,6 @@ ai/group_template/SelMahumDrill.java
 ai/group_template/SelMahumSquad.java
 ai/group_template/SilentValley.java
 ai/group_template/StakatoNest.java
-ai/group_template/SummonMinions.java
 ai/group_template/SummonPc.java
 ai/group_template/TurekOrcs.java
 ai/group_template/VarkaKetra.java

L2J_DataPack_BETA/dist/game/data/scripts/ai/group_template/MinionSpawnManager.java

@@ -35,11 +35,12 @@ import com.l2jserver.gameserver.network.clientpackets.Say2;
 import com.l2jserver.util.Rnd;
 
 /**
+ * Minion Spawn Manager.
  * @author Zealar
  */
 public final class MinionSpawnManager extends AbstractNpcAI
 {
-	static Set<Integer> NPC = new HashSet<>(354);
+	private static final Set<Integer> NPC = new HashSet<>(354);
 	
 	static
 	{