title: remove route with google map
body: <p>I got a small app that use the Direction Service feature of Google  Map. It is working well, I can change routes, but I have a small problem, where a user could go back to a list of markers after tracing a route.</p>
  
  <p>I can't find a way to delete routes with google map. For markers I store them and do <code>setMap(null)</code>, do not see a way here...</p>