docker: remove old versions

README.md

roles/container-engine/docker/defaults/main.yml

roles/container-engine/docker/tasks/main.yml

.../container-engine/docker/templates/docker-options.conf.j2

roles/container-engine/docker/templates/docker.service.j2

roles/container-engine/docker/vars/amazon.yml

roles/container-engine/docker/vars/debian.yml

roles/container-engine/docker/vars/fedora.yml

roles/container-engine/docker/vars/redhat-aarch64.yml

roles/container-engine/docker/vars/redhat.yml

roles/container-engine/docker/vars/ubuntu.yml