clean code

apps/app/src/client/components/SavePageControls.tsx

@@ -6,7 +6,6 @@ import { PageGrant } from '@growi/core';
 import { isTopPage, isUsersProtectedPages } from '@growi/core/dist/utils/page-path-utils';
 import { LoadingSpinner } from '@growi/ui/dist/components';
 import { useTranslation } from 'next-i18next';
-import { Disable } from 'react-disable';
 import {
   UncontrolledButtonDropdown, Button,
   DropdownToggle, DropdownMenu, DropdownItem, Modal,