PhantomJS is not needed anymore for the build

.travis.yml

@@ -3,5 +3,4 @@ node_js:
     - "0.10.33"
 before_install:
     - "npm install -g grunt-cli"
-    - "npm install -g phantomjs"
 install: npm install

server_config/server_install.sh

@@ -12,7 +12,7 @@ sudo apt-get install -y nodejs
 source ~/.profile
 
 # Installation of some packages globally
-npm install bower forever grunt-cli phantomjs -g
+npm install bower forever grunt-cli -g
 source ~/.profile
 
 # Installation of YellowLabTools

server_config/server_update.sh

@@ -18,8 +18,6 @@ bower install --config.interactive=false --allow-root
 
 # Front-end compilation
 rm -rf front/build
-npm install grunt-cli -g
-npm install phantomjs -g
 grunt build
 
 # Restart the server