code: public void removeDisplay(String displayID) throws ShanksException {
          Scenario3DPortrayal scenarioPortrayal = (Scenario3DPortrayal) this
                  .getSimulation().getScenarioPortrayal();
          HashMap<String, Display3D> displays = scenarioPortrayal.getDisplays();
          if (displays.containsKey(displayID)) {
              displays.remove(displayID);
          }
      }
docs: Remove a display from the simulation
  
  @param displayID
  @throws ScenarioNotFoundException
  @throws DuplicatedPortrayalIDException