docker: clean up unused service

site-modules/role/manifests/rancher_node.pp

 class role::rancher_node inherits role::swh_base {
-  include profile::docker
-  include profile::zfs::docker
   include profile::zfs::kubelet
   include profile::zfs::rancher
   include profile::mountpoints

site-modules/role/manifests/swh_cassandra_node.pp

@@ -2,5 +2,4 @@
 class role::swh_cassandra_node inherits role::swh_base {
   include profile::zfs
   include profile::cassandra
-  include profile::docker
 }