Fix Water duping with ice

FightSystem_Main/src/de/steamwar/fightsystem/listener/InFightInventoryListener.java

@@ -100,7 +100,6 @@ public class InFightInventoryListener extends BasicListener {
                 type = Material.PISTON;
                 break;
             case ICE:
-            case PACKED_ICE:
                 return;
         }
         ItemStack itemStack;