docs: updated docs removed unnecessary imports and empty methods (#48428

)

Removed empty methods and unnecessary imports in files

PR Close #48428

aio/content/examples/getting-started/src/app/cart.service.1.ts

@@ -3,8 +3,4 @@ import { Injectable } from '@angular/core';
 @Injectable({
   providedIn: 'root'
 })
-export class CartService {
-
-  constructor() {}
-
-}
+export class CartService {}

aio/content/examples/ngmodules/src/app/items/items.component.ts

@@ -1,15 +1,9 @@
-import { Component, OnInit } from '@angular/core';
+import { Component } from '@angular/core';
 
 @Component({
   selector: 'app-items',
   templateUrl: './items.component.html',
   styleUrls: ['./items.component.css']
 })
-export class ItemsComponent implements OnInit {
+export class ItemsComponent {}
 
-  constructor() { }
-
-  ngOnInit() {
-  }
-
-}

aio/content/examples/providers/src/app/user.service.ts

@@ -9,9 +9,6 @@ export interface User {
   providedIn: 'root',
 })
 export class UserService {
-
-  constructor() { }
-
   getUsers(): Promise<User[]> {
     return Promise.resolve([
       { id: 1, name: 'Maria' },
@@ -26,5 +23,4 @@ export class UserService {
       { id: 10, name: 'Seth' }
     ]);
   }
-
 }