Removed Drone, service is dead

readme.md

@@ -46,7 +46,6 @@ glm::mat4 camera(float Translate, glm::vec2 const & Rotate)
 
 | Service | System | Compiler | Status |
 | ------- | ------ | -------- | ------ |
-| [Drone](https://drone.io/github.com/g-truc/glm) | Linux 64 bits | GCC 4.6.3 | [![Build Status](https://drone.io/github.com/g-truc/glm/status.png)](https://drone.io/github.com/g-truc/glm/latest) |
 | [Travis CI](https://travis-ci.org/g-truc/glm)| MacOSX, Linux 64 bits | Clang 3.4, Clang 3.8, GCC 4.9 | [![Travis CI](https://travis-ci.org/g-truc/glm.svg?branch=master)](https://travis-ci.org/g-truc/glm)
 | [AppVeyor](https://ci.appveyor.com/project/Groovounet/glm)| Windows 32 and 64 | Visual Studio 2013 | [![AppVeyor](https://ci.appveyor.com/api/projects/status/32r7s2skrgm9ubva?svg=true)](https://ci.appveyor.com/project/Groovounet/glm)