diff --git a/src/components/IndexTreeBlock.tsx b/src/components/IndexTreeBlock.tsx
index bbdb24a..88e5e3d 100644
--- a/src/components/IndexTreeBlock.tsx
+++ b/src/components/IndexTreeBlock.tsx
@@ -4,7 +4,6 @@ import Tree, { TreeNode, ExpandData, SelectData } from 'rc-tree';
 import IndexUtil, { Index, INDEX_ID_PUBLIC } from '../common/IndexUtil';
 import 'rc-tree/assets/index.css';
 import styles from './IndexTreeBlock.module.css';
-import { emitKeypressEvents } from 'readline';
 
 interface Props extends RouteComponentProps { }