Remove @extends and @constructor annotations

src/ol/events/Event.js

@@ -11,12 +11,12 @@
  * `stopPropagation` and `preventDefault` methods. It is meant as base class
  * for higher level events defined in the library, and works with
  * {@link module:ol/events/EventTarget~EventTarget}.
- *
- * @constructor
- * @param {string} type Type.
  */
 class Event {
 
+  /**
+   * @param {string} type Type.
+   */
   constructor(type) {
 
     /**

src/ol/events/EventTarget.js

@@ -26,8 +26,6 @@ import Event from '../events/Event.js';
  *    `stopPropagation` or `preventDefault` on an event object, it means that no
  *    more listeners after this one will be called. Same as when the listener
  *    returns false.
- *
- * @constructor
  */
 class EventTarget extends Disposable {
   constructor() {