trusty: Fix duplicated user creation

trusty/x86_64/Dockerfile

@@ -19,11 +19,6 @@ RUN eatmydata apt-get install -y \
   sudo wget curl tar expect git \
   devscripts build-essential lintian ccache pbuilder aptitude apt-utils
 
-RUN groupadd -g 1000 jenkins \
- && useradd -u 1000 -g 1000 -m jenkins \
- && echo 'Defaults:jenkins !requiretty' | tee -a /etc/sudoers \
- && echo 'jenkins ALL=(ALL:ALL) NOPASSWD: ALL' | tee -a /etc/sudoers
-
 RUN curl https://packages.icinga.com/icinga.key | apt-key add - \
  && DIST=trusty \
  && echo "deb http://packages.icinga.com/ubuntu icinga-${DIST} main" > /etc/apt/sources.list.d/${DIST}-icinga.list