refactor: remove useless searchProvider from i18n config

Author: shadow3aaa

docs/.vitepress/config.ts

@@ -77,7 +77,6 @@ const vitePressSidebarConfigs = supportedLocales.map((lang) => ({
 const vitePressI18nConfig: VitePressI18nOptions = {
   // VitePress I18n config
   locales: ["en", "zhHans"],
-  searchProvider: "local",
   themeConfig: {
     zhHans: {
       nav: [