refactor: remove useless code

Author: kagol

src/components/app-content.vue

@@ -23,12 +23,6 @@
       </ul>
       <nav class="side-nav">
         <!-- TODO: 左侧组件导航 d-accordion -->
-        <!-- <div v-for="category in componentsData" v-bind:key="category">
-          {{ category.title }}
-          <div v-for="component in category.children" v-bind:key="component">
-            <router-link :to="component.link">{{ component.title }}</router-link>
-          </div>
-        </div> -->
         <d-accordion :data="componentsData" :linkType="'routerLink'"></d-accordion>
       </nav>
     </div>