Remove unnecessary sudo

.gitlab-ci.yml

@@ -4,11 +4,11 @@ build:
   variables:
     DEBIAN_FRONTEND: noninteractive
   before_script:
-    - sudo apt-get update
-    - sudo apt-get install -y ant dvipng maven python-imaging rubber texlive-fonts-recommended texlive-latex-extra texlive-math-extra wget
+    - apt-get update
+    - apt-get install -y ant dvipng maven python-imaging rubber texlive-fonts-recommended texlive-latex-extra texlive-math-extra wget
     - wget -O plastex.tar.gz https://github.com/tiarno/plastex/archive/1.0.0.tar.gz
     - tar -xzvf plastex.tar.gz
-    - cd plastex-1.0.0 && sudo python setup.py install
+    - cd plastex-1.0.0 && python setup.py install
   script:
     - cd org.rodinp.handbook.feature
     - ant -file customBuild.xml