title: fullcalendar - remove a dropped event after eventRender
body: <p>I want to add events to database using fullcalendar and I have succeeded in my approach. However after the event renders in the calendar there are two similar events. One that has been dropped and the other that has been rendered after successful ajax request.</p>
  
  <p>Here is the code</p>
  
  <pre><code>drop: function(date, event) {
              var title = event.target.textContent;
              var start = date.format();
              $.ajax({
                  url: 'process.php',
                  data: 'type=new&amp;title='+title+'&amp;startdate='+start,
                  type: 'POST',
                  dataType: 'json',
                  async: false,
                  success: function(response){
                      $('#calendar').fullCalendar('renderEvent',response.eventblock,false);
                  },
                  error: function(e){
                      console.log(e.responseText);
                  }
              });
              console.log(event);
          }
  </code></pre>
  
  <p>In the success block I've used renderEvent to add event to calendar. How do I remove the dropped event after successful ajax request?</p>
  
  <p><img src="https://s1.postimg.org/r0bs3mj4v/Capture.png"></p>