Delete unused jhipster sample components

See also 18d515d

Issue: IBP-2078 / IBP-2302
Reviewer: None

src/main/jhipster/src/main/webapp/app/entities/sample/index.ts

@@ -1,9 +1,5 @@
 export * from './sample.model';
-export * from './sample-popup.service';
 export * from './sample.service';
-export * from './sample-dialog.component';
-export * from './sample-delete-dialog.component';
-export * from './sample-detail.component';
 export * from './sample-manager.component';
 export * from './sample.component';
 export * from './sample.route';