title: Openlayers 3 remove drawn feature
body: <p><strong>I am adding "draw interaction" and drawing features on a map...</strong></p>
  
  <pre><code> webMapValues.drawObj = new ol.interaction.Draw({                                
                              features: features,
                              type: /** @type {ol.geom.GeometryType} */ (webMapValues.drawType)
  
                          });
  </code></pre>
  
  <p><strong>I am catching the "drawend" event...</strong></p>
  
  <pre><code> webMapValues.drawObj.on('drawend', function (e) {                            
  
                          //Here I am saving my feature to a data base
                            and displaying the saved vector...
                          control.UpdateObjects(e, "Draw");
  
                          //Here I would like to remove the vector that
                            draw interaction placed and just display the 
                            vector from the db
  
  
                      });
  </code></pre>
  
  <p>I can not figure out how to remove the vector that ol.interaction.Draw has placed so that only the vector from the data base shows after I save it?</p>
  
  <p>I guess 'drawend' is not the place to do this...but I'm not sure how to achieve the functionality I need then...</p>
  
  <p>any help is greatly appreciated!!</p>