fix: fix #3746,there is only one loading now

src/layouts/BasicLayout.js

@@ -9,7 +9,6 @@ import logo from '../assets/logo.svg';
 import Footer from './Footer';
 import Header from './Header';
 import Context from './MenuContext';
-import PageLoading from '@/components/PageLoading';
 import SiderMenu from '@/components/SiderMenu';
 import getPageTitle from '@/utils/getPageTitle';
 import styles from './BasicLayout.less';
@@ -154,7 +153,7 @@ class BasicLayout extends React.Component {
             )}
           </ContainerQuery>
         </DocumentTitle>
-        <Suspense fallback={<PageLoading />}>{this.renderSettingDrawer()}</Suspense>
+        <Suspense fallback={null}>{this.renderSettingDrawer()}</Suspense>
       </React.Fragment>
     );
   }