core: add server-loader (#816)

packages/ui-default/components/autocomplete/ProblemSelectAutoComplete.tsx

@@ -1,7 +1,5 @@
-import { assign } from 'lodash';
 import React from 'react';
 import ReactDOM from 'react-dom/client';
-import DOMAttachedObject from 'vj/components/DOMAttachedObject';
 import AutoComplete from '.';
 import ProblemSelectAutoCompleteFC from './components/ProblemSelectAutoComplete';
 
@@ -44,5 +42,4 @@ export default class ProblemSelectAutoComplete extends AutoComplete {
   }
 }
 
-assign(ProblemSelectAutoComplete, DOMAttachedObject);
 window.Hydro.components.ProblemSelectAutoComplete = ProblemSelectAutoComplete;