title: Remove a specific event on fullcalendar using a custom function
body: <p>I am attempting to remove a single event using below function, just wondering why it's removing all events instead of the supplied title or id, I am calling it using on <code>drop</code> function.</p>
  
  <pre><code> function  removeEvent(id){
      console.log("we remove id " + id);
  
      $('#calendar').fullCalendar('removeEvents',  function(event){
  
          return event.title = id;
  
      });
  </code></pre>