Remove release badge, as it doesn't track the actual highest release

README.md

@@ -4,7 +4,6 @@
 
 [![][travis img]][travis]
 [![][maven img]][maven]
-[![][release img]][release]
 [![][license img]][license]
 
 Hystrix is a latency and fault tolerance library designed to isolate points of access to remote systems, services and 3rd party libraries, stop cascading failure and enable resilience in complex distributed systems where failure is inevitable.