code: public static void removeAgent(ShanksSimulation sim, String agentID)
              throws ShanksException {
          sim.logger.info("Stoppable not fount. Attempting direct stop...");
          sim.unregisterShanksAgent(agentID);
          sim.logger.info("Agent " + agentID + " stopped.");
      }
docs: "Removes" an agent with the given name from the simulation
  
  Be careful: what this actually do is to stop the agent execution.
  
  @param sim
  -The Shanks Simulation
  @param agentID
  - The name of the agent to remove
  @throws ShanksException
  An UnkownAgentException if the Agent ID is not found on the
  simulation.