Merge pull request #1226 from mvargeson/typo-docs-default-config

Fix small typo on default config doc page

docs/pages/configurations/default-config/index.md

@@ -47,7 +47,7 @@ You can also import images and media files directly via JavaScript.
 This helps you to write stories with media files easily. This is how to do it:
 
 ```js
-import React from 'react';;
+import React from 'react';
 import { storiesOf } from '@storybook/react';
 
 import imageFile from './static/image.png';