New method implemented.

src/engine/gameManager/BuildingManager.java

@@ -364,42 +364,18 @@ public enum BuildingManager {
 
         if (building.getRank() < 1) {
 
-            for (AbstractCharacter slottedNPC : building.getHirelings().keySet()) {
+            for (AbstractCharacter slottedNPC : building.getHirelings().keySet())
+                BuildingManager.removeHireling(building, slottedNPC);
 
-                if (slottedNPC.getObjectType() == Enum.GameObjectType.NPC)
-                    ((NPC) slottedNPC).remove();
-                else if (slottedNPC.getObjectType() == Enum.GameObjectType.Mob)
-                    NPCManager.removeMobileFromBuilding(((Mob) slottedNPC), building);
-            }
             return;
         }
 
         // Delete hireling if building has deranked.
-        for (AbstractCharacter hireling : building.getHirelings().keySet()) {
-
-            NPC npc = null;
-            Mob mob = null;
 
-            if (hireling.getObjectType() == Enum.GameObjectType.NPC)
-                npc = (NPC) hireling;
-            else if (hireling.getObjectType() == Enum.GameObjectType.Mob)
-                mob = (Mob) hireling;
+        for (AbstractCharacter hireling : building.getHirelings().keySet()) {
 
             if (building.getHirelings().get(hireling) > building.getBlueprint().getSlotsForRank(building.getRank()))
-
-                if (npc != null) {
-                    if (!npc.remove())
-                        Logger.error("Failed to remove npc " + npc.getObjectUUID()
-                                + "from Building " + building.getObjectUUID());
-                    else
-                        building.getHirelings().remove(npc);
-                } else if (mob != null) {
-                    if (!NPCManager.removeMobileFromBuilding(mob, building))
-                        Logger.error("Failed to remove npc " + npc.getObjectUUID()
-                                + "from Building " + building.getObjectUUID());
-                    else
-                        building.getHirelings().remove(npc);
-                }
+                BuildingManager.removeHireling(building, hireling);
 
         }