README.md: remove drone.io badge

Clement Champetier · Clement Champetier · commit 170a9d6519af · 2015-04-24T18:56:40.000+02:00
Not maintained.
diff --git a/README.md b/README.md
@@ -51,9 +51,6 @@ codec=codecName
 
 #### Continuous Integration
 
-###### Drone.io  
-[![Build Status](https://drone.io/github.com/avTranscoder/avTranscoder/status.png)](https://drone.io/github.com/avTranscoder/avTranscoder/latest)
-
 ###### Travis
 [![Build Status](https://travis-ci.org/avTranscoder/avTranscoder.svg?branch=master)](https://travis-ci.org/avTranscoder/avTranscoder)
 
