refactor(schedule): switch back to menuToggle

packages/demos/conference-app/angular/src/pages/schedule/schedule.html

@@ -2,7 +2,7 @@
   <ion-header>
     <ion-toolbar>
       <ion-buttons slot="start">
-        <ion-button (click)="toggleMenu()"> <!-- TODO menu toggle -->
+        <ion-button menuToggle>
           <ion-icon slot="icon-only" name="menu"></ion-icon>
         </ion-button>
       </ion-buttons>

packages/demos/conference-app/angular/src/pages/schedule/schedule.ts

@@ -4,7 +4,6 @@ import {
   AlertController,
   App,
   LoadingController,
-  MenuController,
   ModalController,
   NavController,
   ToastController
@@ -49,7 +48,6 @@ export class SchedulePage {
     public alertCtrl: AlertController,
     public app: App,
     public loadingCtrl: LoadingController,
-    public menuController: MenuController,
     public modalCtrl: ModalController,
     public navCtrl: NavController,
     public toastCtrl: ToastController,
@@ -184,8 +182,4 @@ export class SchedulePage {
     });
   }
   */
-
-  toggleMenu() {
-    this.menuController.toggle();
-  }
 }