message: docs(aio): update pipes for CLI
diff: @@ -214,7 +214,6 @@ Note the following:
  * You use your custom pipe the same way you use built-in pipes.
  * You must include your pipe in the `declarations` array of the `AppModule`.
  -
  <div class="callout is-helpful">
  <header>
  @@ -222,10 +221,9 @@ Note the following:
  </header>
  -You must manually register custom pipes.
  +You must register custom pipes.
  If you don't, Angular reports an error.
  -In the previous example, you didn't list the `DatePipe` because all
  -Angular built-in pipes are pre-registered.
  +Angular CLI's generator registers the pipe automatically.
  </div>
  