fix lint err

src/client/js/components/Navbar/GrowiSubNavigation.jsx

@@ -1,10 +1,8 @@
-import React, { useMemo } from 'react';
+import React from 'react';
 import PropTypes from 'prop-types';
 
 import { withTranslation } from 'react-i18next';
 
-import { isTrashPage } from '@commons/util/path-utils';
-
 import DevidedPagePath from '@commons/models/devided-page-path';
 import LinkedPagePath from '@commons/models/linked-page-path';
 import PagePathHierarchicalLink from '@commons/components/PagePathHierarchicalLink';