docs: replace class hero to interface wherever class properties not used (#34022)

Fixes #21186

PR Close #34022

aio/content/examples/styleguide/src/01-01/app/heroes/hero.component.avoid.ts

@@ -4,7 +4,7 @@ import { Component, NgModule, OnInit } from '@angular/core';
 import { BrowserModule } from '@angular/platform-browser';
 import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
 
-class Hero {
+interface Hero {
   id: number;
   name: string;
 }

aio/content/examples/styleguide/src/01-01/app/heroes/shared/hero.model.ts

@@ -1,5 +1,5 @@
 // #docregion
-export class Hero {
+export interface Hero {
   id: number;
   name: string;
 }

aio/content/examples/styleguide/src/03-03/app/core/hero.model.ts

@@ -1,6 +1,6 @@
 // #docregion
 // #docregion example
-export class Hero {
+export interface Hero {
   name: string;
   power: string;
 }

aio/content/examples/styleguide/src/03-06/app/heroes/shared/hero.model.ts

@@ -1,6 +1,6 @@
 // #docregion
 // #docregion example
-export class Hero {
+export interface Hero {
   name: string;
   power: string;
 }

aio/content/examples/styleguide/src/05-04/app/heroes/shared/hero.model.ts

@@ -1,5 +1,5 @@
 // #docregion
-export class Hero {
+export interface Hero {
   id: number;
   name: string;
 }

aio/content/examples/styleguide/src/05-15/app/heroes/shared/hero.model.ts

@@ -1,5 +1,5 @@
 // #docregion
-export class Hero {
+export interface Hero {
   id: number;
   name: string;
 }

aio/content/examples/styleguide/src/05-17/app/heroes/shared/hero.model.ts

@@ -1,5 +1,5 @@
 // #docregion
-export class Hero {
+export interface Hero {
   id: number;
   name: string;
 }

aio/content/examples/styleguide/src/07-01/app/heroes/shared/hero.model.ts

@@ -1,5 +1,5 @@
 // #docregion
-export class Hero {
+export interface Hero {
   id: number;
   name: string;
 }

aio/content/examples/styleguide/src/07-03/app/heroes/shared/hero.model.ts

@@ -1,5 +1,5 @@
 // #docregion
-export class Hero {
+export interface Hero {
   id: number;
   name: string;
 }

aio/content/examples/styleguide/src/07-04/app/heroes/shared/hero.model.ts

@@ -1,5 +1,5 @@
 // #docregion
-export class Hero {
+export interface Hero {
   id: number;
   name: string;
 }