Fix upgrade for canal and apiserver cert

Fixes #1573

roles/kubernetes-apps/network_plugin/canal/tasks/main.yml

@@ -8,18 +8,6 @@
     resource: "configmap"
     namespace: "{{system_namespace}}"
 
-# FIXME: remove if kubernetes/features#124 is implemented
-- name: Purge old flannel and canal-node
-  run_once: true
-  kube:
-    name: "canal-node"
-    kubectl: "{{ bin_dir }}/kubectl"
-    filename: "{{ kube_config_dir }}/canal-node.yaml"
-    resource: "ds"
-    namespace: "{{system_namespace}}"
-    state: absent
-  when: inventory_hostname == groups['kube-master'][0] and canal_node_manifest.changed
-
 - name: Start flannel and calico-node
   run_once: true
   kube: