example(core): update hellow world example to use components without @view

Author: vsavkin

modules/examples/src/hello_world/index.ts

@@ -42,10 +42,7 @@ class RedDec {
  selector: 'hello-app',
  // These are services that would be created if a class in the component's
  // template tries to inject them.
- viewBindings: [GreetingService]
-})
-// The template for the component.
-@View({
+ viewBindings: [GreetingService],
  // Expressions in the template (like {{greeting}}) are evaluated in the
  // context of the HelloCmp class below.
  template: `<div class="greeting">{{greeting}} <span red>world</span>!</div>