Remove unused props in documentation

src/Calendar.js

@@ -120,21 +120,15 @@ class Calendar extends React.Component {
      *
      *  - start time
      *  - end time
-     *  - title
-     *  - whether its an "all day" event or not
-     *  - any resource the event may be related to
      *
      * Each of these properties can be customized or generated dynamically by
      * setting the various "accessor" props. Without any configuration the default
      * event should look like:
      *
      * ```js
      * BackgroundEvent {
-     *   title: string,
      *   start: Date,
      *   end: Date,
-     *   allDay?: boolean
-     *   resource?: any,
      * }
      * ```
      */