message: docs: remove broken code from TOH tutorial
  At the end of Part 2 of the Tour or Heroes tutorial, there is a code sample that is broken. It looks like it was added by mistake because it is not related to the summary.
  PR Close
diff: @@ -203,10 +203,4 @@ Here are the code files discussed on this page, including the `HeroesComponent`
  * You used `*ngIf` to conditionally include or exclude a block of HTML
  * You can toggle a CSS style class with a `class` binding.
  - <code-example format="typescript" language="typescript">
  -
  - header="src/app/heroes/heroes.component.html (HeroesComponent's template)"
  -
  - </code-example>
  -
  -@reviewed 2022-02-28
  +@reviewed 2022-05-23
  