remove unnecessary changes

packages/app/src/components/Sidebar/PageTree/Item.tsx

@@ -527,7 +527,6 @@ const Item: FC<ItemProps> = (props: ItemProps) => {
         isOpen && hasChildren() && currentChildren.map((node, index) => (
           <div key={node.page._id} className="grw-pagetree-item-children">
             <Item
-              key={node.page.path}
               isEnableActions={isEnableActions}
               itemNode={node}
               isOpen={false}

packages/app/src/components/Sidebar/PageTree/ItemsTree.tsx

@@ -1,5 +1,5 @@
 import React, {
-  useEffect, useRef, useState, useMemo, useCallback, memo,
+  useEffect, useRef, useState, useMemo, useCallback,
 } from 'react';
 
 import { Nullable } from '@growi/core';
@@ -291,4 +291,4 @@ const ItemsTree = (props: ItemsTreeProps): JSX.Element => {
   return <></>;
 };
 
-export default memo(ItemsTree);
+export default ItemsTree;