remove codecov badge

Author: Ben Roberts

README.md

@@ -1,5 +1,4 @@
-# Hypernova-PHP [![Build Status](https://travis-ci.org/wayfair/hypernova-php.svg?branch=master)](https://travis-ci.org/wayfair/hypernova-php) [![codecov](https://codecov.io/gh/wayfair/hypernova-php/branch/master/graph/badge.svg)](https://codecov.io/gh/wayfair/hypernova-php)
-
+# Hypernova-PHP [![Build Status](https://travis-ci.org/wayfair/hypernova-php.svg?branch=master)](https://travis-ci.org/wayfair/hypernova-php) 
 
 > PHP client for your [Hypernova service](https://github.com/airbnb/hypernova).