Fix for failing Travis build

Author: Dimitri van Heesch

.travis.yml

@@ -5,7 +5,6 @@ before_install:
     - sudo add-apt-repository ppa:texlive-backports/ppa -y
     - sudo apt-get update -qq
     - sudo apt-get install -qq  texlive texlive-extra-utils texlive-latex-extra libxml2-utils
-    - wget -qO- http://www.cmake.org/files/v3.1/cmake-3.1.0-Linux-x86_64.tar.gz | tar xvz
 
 script:
     - mkdir build