fix: [docker-host] debian 10 compatibility, removing support for registry v1

Signed-off-by: Valentin Lab <valentin.lab@kalysto.org>

precise/host/hooks/install.d/60-docker.sh

@@ -6,7 +6,7 @@ if ! type -p docker; then
     curl -sSL https://get.docker.io | sh
 fi
 
-docker_version=17.06
+docker_version=17
 if ! [[ "$(docker --version)" == "Docker version $docker_version"* ]]; then
     version="$(apt-cache madison docker-ce | cut -f 2 -d \| | grep "$docker_version" | head -n 1 | xargs echo)"
     ## DOWNGRADE to 17.xx because 18.xx do not support registry v1
@@ -14,12 +14,6 @@ if ! [[ "$(docker --version)" == "Docker version $docker_version"* ]]; then
     need_restart=true
 fi
 
-
-if ! egrep 'disable-legacy-registry' /lib/systemd/system/docker.service 2>/dev/null; then
-    sed -ri 's/^(ExecStart=.*)$/\1 --disable-legacy-registry=false/g' /lib/systemd/system/docker.service
-    need_restart=true
-fi
-
 if [ "$need_restart" ]; then
     systemctl daemon-reload &&
         service docker restart