Simplify docker role, cbr0 for calico isn't required anymore

roles/docker/tasks/configure.yml

@@ -1,12 +1,4 @@
 ---
-- name: Write script for calico/docker bridge configuration
-  template: src=create_cbr.j2 dest=/etc/network/if-up.d/create_cbr mode=u+x backup=yes
-  when: kube_network_plugin is defined and kube_network_plugin == "calico"
-
-- name: Configure calico/docker bridge
-  command: /etc/network/if-up.d/create_cbr
-  when: kube_network_plugin is defined and kube_network_plugin == "calico"
-
 - name: enable docker
   service:
     name: docker