Remove extra newline

README.md

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 [![devDependency Status](https://david-dm.org/atom/electron/dev-status.svg)](https://david-dm.org/atom/electron#info=devDependencies)
 [![Join the Electron Community on Slack](http://atom-slack.herokuapp.com/badge.svg)](http://atom-slack.herokuapp.com/)
 
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 :zap: *formerly known as Atom Shell* :zap:
 
 The Electron framework lets you write cross-platform desktop applications