change README.md

src/App.tsx

@@ -1,4 +1,4 @@
-import { useState, FC } from 'react';
+import { FC } from 'react';
 import { useLocation, useNavigate } from 'react-router-dom';
 import {
   TeamOutlined,
@@ -81,7 +81,6 @@ interface BreadcrumbItem {
 }
 
 const AppLayout: FC<{ router: JSX.Element }> = (props) => {
-  const [collapsed, setCollapsed] = useState(false);
   const { colorBgContainer, borderRadiusLG } = theme.getDesignToken();
   const navigate = useNavigate();
 
@@ -103,11 +102,7 @@ const AppLayout: FC<{ router: JSX.Element }> = (props) => {
 
   return (
     <Layout style={{ minHeight: '100vh' }}>
-      <Sider
-        collapsible
-        collapsed={collapsed}
-        onCollapse={(value) => setCollapsed(value)}
-      >
+      <Sider>
         <div className='demo-logo-vertical' />
         <Menu
           theme='dark'