Remove build status

Author: mpv1989

README.md

@@ -3,13 +3,6 @@
 
 # arangodb-java-driver
 
-2.7: [![Build Status](https://secure.travis-ci.org/arangodb/arangodb-java-driver.svg?branch=2.7)](https://travis-ci.org/arangodb/arangodb-java-driver) 
-3.0: [![Build Status](https://secure.travis-ci.org/arangodb/arangodb-java-driver.svg?branch=3.0)](https://travis-ci.org/arangodb/arangodb-java-driver) 
-3.1: [![Build Status](https://secure.travis-ci.org/arangodb/arangodb-java-driver.svg?branch=3.1)](https://travis-ci.org/arangodb/arangodb-java-driver) 
-4.1: [![Build Status](https://secure.travis-ci.org/arangodb/arangodb-java-driver.svg?branch=4.1)](https://travis-ci.org/arangodb/arangodb-java-driver) 
-4.2: [![Build Status](https://secure.travis-ci.org/arangodb/arangodb-java-driver.svg?branch=4.2)](https://travis-ci.org/arangodb/arangodb-java-driver) 
-master: [![Build Status](https://secure.travis-ci.org/arangodb/arangodb-java-driver.svg?branch=master)](https://travis-ci.org/arangodb/arangodb-java-driver)
-
 [![Maven Central](https://maven-badges.herokuapp.com/maven-central/com.arangodb/arangodb-java-driver/badge.svg)](https://maven-badges.herokuapp.com/maven-central/com.arangodb/arangodb-java-driver)
 
 ## Supported versions