docs: change wrong default app module by ng new (#38549)

In bootstrapping.md the default AppModule has some extra imports which are not generated
by default in ng new removed those extra imports and add them at appropriate place.

PR Close #38549

aio/content/examples/bootstrapping/src/app/app.module.ts

@@ -21,11 +21,13 @@ import { ItemDirective } from './item.directive';
     ItemDirective
   ],
   // #enddocregion declarations
+  // #docregion imports
   imports: [
     BrowserModule,
     FormsModule,
     HttpClientModule
   ],
+  // #enddocregion imports
   providers: [],
   bootstrap: [AppComponent]
 })

aio/content/guide/bootstrapping.md

@@ -18,8 +18,6 @@ When you use the [Angular CLI](cli) command `ng new` to generate an app, the def
 /* JavaScript imports */
 import { BrowserModule } from '@angular/platform-browser';
 import { NgModule } from '@angular/core';
-import { FormsModule } from '@angular/forms';
-import { HttpClientModule } from '@angular/common/http';
 
 import { AppComponent } from './app.component';
 
@@ -29,9 +27,7 @@ import { AppComponent } from './app.component';
     AppComponent
   ],
   imports: [
-    BrowserModule,
-    FormsModule,
-    HttpClientModule
+    BrowserModule
   ],
   providers: [],
   bootstrap: [AppComponent]
@@ -120,9 +116,6 @@ Now you could use your `ItemDirective` in a component. This example uses `AppMod
 
 Remember, components, directives, and pipes belong to one module only. You only need to declare them once in your app because you share them by importing the necessary modules. This saves you time and helps keep your app lean.
 
-
-
-
 {@a imports}
 
 ## The `imports` array
@@ -130,6 +123,12 @@ Remember, components, directives, and pipes belong to one module only. You only
 The module's `imports` array appears exclusively in the `@NgModule` metadata object.
 It tells Angular about other NgModules that this particular module needs to function properly.
 
+<code-example
+    path="bootstrapping/src/app/app.module.ts"
+    region="imports"
+    header="src/app/app.module.ts (excerpt)">
+</code-example>
+
 This list of modules are those that export components, directives, or pipes
 that component templates in this module reference. In this case, the component is
 `AppComponent`, which references components, directives, or pipes in `BrowserModule`,
@@ -138,6 +137,8 @@ A component template can reference another component, directive,
 or pipe when the referenced class is declared in this module or
 the class was imported from another module.
 
+
+
 {@a bootstrap-array}
 
 ## The `providers` array