docs(content): remove unused docs

ionic/components/content/content.ts

@@ -88,29 +88,6 @@ export class Content extends Ion {
 
   /**
    * @private
-   * Adds the specified scroll handler to the content' scroll element.
-   *
-   * ```ts
-   * @Page({
-   *   template: `<ion-content id="my-content"></ion-content>`
-   * )}
-   * export class MyPage{
-   *    constructor(app: IonicApp){
-   *        this.app = app;
-   *    }
-   *   // Need to wait until the component has been initialized
-   *   ngAfterViewInit() {
-   *     // Here 'my-content' is the ID of my ion-content
-   *     this.content = this.app.getComponent('my-content');
-   *     this.content.addScrollListener(this.myScroll);
-   *   }
-   *     myScroll() {
-   *      console.info('They see me scrolling...');
-   *    }
-   * }
-   * ```
-   * @param {Function} handler  The method you want perform when scrolling
-   * @returns {Function} A function that removes the scroll handler.
    */
   addScrollListener(handler) {
     return this._addListener('scroll', handler);