deb: remove "Conflicts: lxc-docker, lxc-docker-virtual-package"

These conflicts were added as part of the first implementation of the deb
packaging scripts in [eee1efc] (2015)
to replace the old packages. These packages where part of the old PPA at
get.docker.io (see [1], [2]), which is long gone;

    curl -I https://get.docker.io/ubuntu
    HTTP/1.1 301 Moved Permanently
    content-length: 0
    location: https://get.docker.com/ubuntu

    curl -fsSL https://get.docker.com/ubuntu
    echo "# WARNING! This script is deprecated. Please use the script"
    echo "# at https://get.docker.com/"
    exit 1

[eee1efc]: moby/moby@eee1efc
[2]: https://www.ubuntuupdates.org/package/docker/docker/main/base/lxc-docker
[3]: https://www.ubuntuupdates.org/ppa/docker?dist=docker

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

deb/common/control

@@ -41,9 +41,7 @@ Recommends: apparmor,
 Suggests: aufs-tools [amd64], cgroupfs-mount | cgroup-lite
 Conflicts: docker (<< 1.5~),
            docker-engine,
-           docker.io,
-           lxc-docker,
-           lxc-docker-virtual-package
+           docker.io
 Replaces: docker-engine
 Description: Docker: the open-source application container engine
  Docker is a product for you to build, ship and run any application as a
@@ -63,9 +61,7 @@ Recommends: docker-buildx-plugin,
             docker-compose-plugin
 Conflicts: docker (<< 1.5~),
            docker-engine,
-           docker.io,
-           lxc-docker,
-           lxc-docker-virtual-package
+           docker.io
 Replaces: docker-ce (<< 5:0)
 Breaks: docker-ce (<< 5:0)
 Description: Docker CLI: the open-source application container engine