fix(cli): remove docsearch (#11415)

* fix(cli): remove docsearch

* chore: remove react

* docs: add changelog

packages/vant-cli/site/desktop/components/Header.vue

@@ -64,12 +64,6 @@
               {{ langLabel }}
             </a>
           </li>
-
-          <search-input
-            v-if="searchConfig"
-            :lang="lang"
-            :search-config="searchConfig"
-          />
         </ul>
       </div>
     </div>
@@ -77,17 +71,12 @@
 </template>
 
 <script>
-import SearchInput from './SearchInput.vue';
 import { packageVersion } from 'site-desktop-shared';
 import { getDefaultTheme, syncThemeToChild } from '../../common/iframe-sync';
 
 export default {
   name: 'VanDocHeader',
 
-  components: {
-    SearchInput,
-  },
-
   props: {
     lang: String,
     config: Object,
@@ -122,10 +111,6 @@ export default {
       return {};
     },
 
-    searchConfig() {
-      return this.config.searchConfig;
-    },
-
     themeImg() {
       if (this.currentTheme === 'light') {
         return 'https://b.yzcdn.cn/vant/dark-theme.svg';