message: docs: make correction in Tutorial toh-pt6
  Fixes issue [29535](https://github.com/angular/angular/issues/29535) for the tutorial (toh-pt6) to remove the phrase that directed the reader to delete mock-heroes.ts when it is still needed for further tutorial steps.
  PR Close
diff: @@ -79,7 +79,8 @@ Replace the default contents of `in-memory-data.service.ts` with the following:
  <code-example path="toh-pt6/src/app/in-memory-data.service.ts" region="init" header="src/app/in-memory-data.service.ts"></code-example>
  -The `in-memory-data.service.ts` file replaces `mock-heroes.ts`, which is now safe to delete.
  +The `in-memory-data.service.ts` file will take over the function of `mock-heroes.ts`.
  +However, don't delete `mock-heroes.ts` yet, as you still need it for a few more steps of this tutorial.
  When the server is ready, you'll detach the In-memory Web API, and the app's requests will go through to the server.
  