message: docs: update transfer-http docs
  Remove redundant section
diff: @@ -26,22 +26,6 @@ import {TransferHttpCacheModule} from '@nguniversal/common';
  export class AppBrowserModule() {}
  ```
  -You don't have to import anything extra in your AppServerModule.
  -
  -```ts
  -import { NgModule } from '@angular/core';
  -import { ServerModule } from '@angular/platform-server';
  -
  -import { AppModule } from './app.module';
  -import { AppComponent } from './app.component';
  -
  -@NgModule({
  - imports: [AppModule, ServerModule],
  - bootstrap: [AppComponent],
  -})
  -export class AppServerModule {}
  -```
  -
  Finally, in `main.ts` change this:
  ```ts
  