Revert "[IOTDB-2439]Library-UDF documents on website (#4920)" (#4932)

This reverts commit 52643e11.

site/src/main/.vuepress/theme/index.js

@@ -15,30 +15,8 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
-// temporary redirection
-import Vue from 'vue'
-import VueRouter from 'vue-router'
-Vue.use(VueRouter)
-// end
-
 const path = require('path')
 
-// temporary redirection
-export new VueRouter({
-  routes: [
-    {
-      path: '/UserGuide/Master/Libary-UDF/Data-Quality',
-      redirect: '/UserGuide/Master/Process-Data/UDF-Libary'
-    },
-    {
-      path: '/UserGuide/Master/Libary-UDF/Data-Repair',
-      redirect: '/UserGuide/Master/Process-Data/UDF-Libary'
-    }
-  ]
-})
-// end
-
 // Theme API.
 module.exports = (options, ctx) => ({
   alias () {