Remove the manual installation of mavros and mavlink

.docker/Dockerfile

@@ -108,13 +108,6 @@ RUN sudo apt-get -q update \
     && sudo apt-get clean -y \
     && sudo rm -rf /var/lib/apt/lists/*
 
-# Manually install MAVROS from source in the ws_blue/ workspace
-WORKDIR $USER_WORKSPACE/src/
-ARG MAVROS_RELEASE=ros2
-ARG MAVLINK_RELEASE=release/rolling/mavlink
-RUN git clone --depth 1 -b ${MAVROS_RELEASE} https://github.com/mavlink/mavros.git
-RUN git clone --depth 1 --recursive -b ${MAVLINK_RELEASE} https://github.com/ros2-gbp/mavlink-gbp-release.git mavlink
-
 WORKDIR $USER_WORKSPACE
 RUN sudo apt-get -q update \
     && sudo apt-get -q -y upgrade \