bane mechanic complete - working

src/engine/objects/City.java

@@ -1062,14 +1062,12 @@ public class City extends AbstractWorldObject {
     }
 
     private void onExitBane() {
-        Iterator<Integer> iterator = this.baneAttendees.keySet().iterator();
         ArrayList<Integer> toRemove = new ArrayList<>();
-        while (iterator.hasNext()) {
-            Integer uuid = iterator.next();
+        for (Integer uuid : this.baneAttendees.keySet()) {
             if (!_playerMemory.contains(uuid)) {
                 long timeGone = System.currentTimeMillis() - this.baneAttendees.get(uuid).longValue();
                 if (timeGone > 180000L) { // 3 minutes
-                    toRemove.add(uuid);
+                    toRemove.add(uuid); // Mark for removal
                 }
             }
         }