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docs: remove MessageService information from HeroService section (#51501)

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PR Close #51501
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Mikka 2023-08-25 14:36:28 +02:00 committed by Jessica Janiuk
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aio/content/tutorial/tour-of-heroes/toh-pt4.md
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@ -20,10 +20,7 @@ This tutorial creates a `HeroService` that all application classes can use to ge
Instead of creating that service with the [`new` keyword](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Operators/new), use the [*dependency injection*](guide/dependency-injection) that Angular supports to inject it into the `HeroesComponent` constructor.
Services are a great way to share information among classes that *don't know each other*.
Create a `MessageService` next and inject it in these two places.
* Inject in `HeroService`, which uses the service to send a message
* Inject in `MessagesComponent`, which displays that message, and also displays the ID when the user clicks a hero
Create a `HeroService` next and inject it in the `HeroesComponent`, to provide hero data.
## Create the `HeroService`