Removes apt-get installed packages from Dockerfile (#1112)

* remove apt-get installed packages

jenkins-scripts/docker/lib/boilerplate_prepare.sh

@@ -143,8 +143,6 @@ fi
 output_dir=$WORKSPACE/output
 work_dir=$WORKSPACE/work
 
-# TODO: Check for docker package
-NEEDED_HOST_PACKAGES="git python-setuptools python-psutil qemu-user-static gpgv squid-deb-proxy bc"
 # python-argparse is integrated in libpython2.7-stdlib since raring
 # Check for precise in the HOST system (not valid DISTRO variable)
 if [[ $(lsb_release -sr | cut -c 1-5) == '12.04' ]]; then