Remove BitDeli badge

This thing seems broken so I'm removing it.

README.md

@@ -5,7 +5,6 @@ NIPAP
 [![Requirements Status](https://requires.io/github/SpriteLink/NIPAP/requirements.svg?branch=master)](https://requires.io/github/SpriteLink/NIPAP/requirements/?branch=master)
 [![Scrutinizer Code Quality](https://scrutinizer-ci.com/g/SpriteLink/NIPAP/badges/quality-score.png?b=master)](https://scrutinizer-ci.com/g/SpriteLink/NIPAP/?branch=master)
 [![Code Climate](https://codeclimate.com/github/SpriteLink/NIPAP/badges/gpa.svg)](https://codeclimate.com/github/SpriteLink/NIPAP)
-[![Bitdeli Badge](https://d2weczhvl823v0.cloudfront.net/SpriteLink/nipap/trend.png)](https://bitdeli.com/free "Bitdeli Badge")
 
 pynipap: [![Latest Version](https://pypip.in/version/pynipap/badge.svg?style=flat)](https://pypi.python.org/pypi/pynipap/) [![Downloads](https://pypip.in/download/pynipap/badge.svg?style=flat)](https://pypi.python.org/pypi/pynipap/)