docs: remove unused examples and images (#28597)

PR Close #28597

aio/content/examples/property-binding/src/app/app.component.ts

@@ -1,30 +0,0 @@
-import { Component } from '@angular/core';
-
-
-@Component({
-  selector: 'app-root',
-  templateUrl: './app.component.html',
-  styleUrls: ['./app.component.css']
-})
-export class AppComponent {
-  itemImageUrl = '../assets/lamp.png';
-  isUnchanged = true;
-  classes = 'special';
-  // #docregion parent-data-type
-  parentItem = 'bananas';
-  // #enddocregion parent-data-type
-
-  // #docregion pass-object
-  currentItem = [{
-    id: 21,
-    name: 'peaches'
-  }];
-  // #enddocregion pass-object
-
-  interpolationTitle = 'Interpolation';
-  propertyTitle = 'Property binding';
-
-  // #docregion malicious-content
-  evilTitle = 'Template <script>alert("evil never sleeps")</script>Syntax';
-  // #enddocregion malicious-content
-}