MOBILE-3562 course: Remove course overview file listing on preview

src/core/courses/pages/course-preview/course-preview.html

@@ -42,7 +42,6 @@
                 </ng-container>
             </ion-item>
 
-            <core-file *ngFor="let file of course.overviewfiles" [file]="file" [component]="component" [componentId]="course.id"></core-file>
             <div *ngIf="!isEnrolled" detail-none>
                 <ion-item text-wrap *ngFor="let instance of selfEnrolInstances">
                     <h2>{{ instance.name }}</h2>

src/core/courses/pages/course-preview/course-preview.ts

@@ -38,7 +38,6 @@ export class CoreCoursesCoursePreviewPage implements OnDestroy {
     course: any;
     isEnrolled: boolean;
     canAccessCourse = true;
-    component = 'CoreCoursesCoursePreview';
     selfEnrolInstances: any[] = [];
     paypalEnabled: boolean;
     dataLoaded: boolean;