Remove sim.repos; ros_gz installed from pkg, not source.

Author: amarburg

.docker/Dockerfile

@@ -185,7 +185,6 @@ RUN [ "/bin/bash" , "-c" , " \
 WORKDIR $USER_WORKSPACE
 RUN sudo apt-get -q update \
     && sudo apt-get -q -y upgrade \
-    && vcs import src < src/blue/sim.repos \
     && rosdep update \
     && rosdep install -y --from-paths src --ignore-src --rosdistro ${ROS_DISTRO} \
     && sudo apt-get autoremove -y \