fix(controller): remove docker engine

The intention of the docker engine was such that we could use it to pull in an image
from a registry and push it to our own. Now that we have registry transfers, this
is no longer required.

Author: Matthew Fisher

controller/bin/boot

@@ -47,18 +47,6 @@ while grep -q '<no value>' /templates/confd_settings.py; do
        sleep $(($ETCD_TTL/2))  # sleep for half the TTL
 done
 
-# remove any pre-existing docker.sock
-test -e /var/run/docker.sock && rm -f /var/run/docker.sock
-
-# spawn a docker daemon to run builds
-docker -d --storage-driver=btrfs --bip=172.20.42.1/16 &
-DOCKER_PID=$!
-
-# wait for docker to start
-while [[ ! -e /var/run/docker.sock ]]; do
-  sleep 1
-done
-
 cd /app
 
 # run an idempotent database migration

controller/bin/entry

@@ -278,7 +278,6 @@
 
 # registry settings
 REGISTRY_MODULE = 'registry.mock'
-REGISTRY_URL = None
 REGISTRY_HOST = 'localhost'
 REGISTRY_PORT = 5000