fix break style in architecture doc

aio/content/guide/architecture.md

@@ -287,8 +287,6 @@ For example, this `HeroListComponent` has a `heroes` property that returns an ar
 that it acquires from a service.
 `HeroListComponent` also has a `selectHero()` method that sets a `selectedHero` property when the user clicks to choose a hero from that list.
 
-
-{@a component-code}
 例如，`HeroListComponent`有一个`heroes`属性，它返回一个英雄数组，这个数组从一个服务获得。
 `HeroListComponent`还有一个`selectHero()`方法，当用户从列表中点选一个英雄时，就把它/她设置到`selectedHero`属性。