Revert "refactor"

This reverts commit 0134e6e420.

packages/frontend/.storybook/preview.ts

@@ -13,7 +13,6 @@ import locale from './locale.js';
 import { commonHandlers, onUnhandledRequest } from './mocks.js';
 import themes from './themes.js';
 import '../src/style.scss';
-import '../../frontend-shared/styles/mfm.scss';
 
 const appInitialized = Symbol();