Removed xvfb setup

Author: Simon Hofmann

.travis.yml

@@ -42,12 +42,6 @@ before_install:
   # use g++-4.8 on Linux
   - if [[ $TRAVIS_OS_NAME == "linux" ]]; then export CXX=g++-4.8; fi
 
-before_script:
-  # Start xvfb
-  - if [[ $TRAVIS_OS_NAME == "linux" ]]; then export DISPLAY=:99.0; fi
-  - if [[ $TRAVIS_OS_NAME == "linux" ]]; then sh -e /etc/init.d/xvfb start; fi
-  - if [[ $TRAVIS_OS_NAME == "linux" ]]; then sleep 3; fi
-
 install: true
 
 script: