Delete default variable use_hyperkube_cni

The variable is now set via a task depending of the version of kube

roles/network_plugin/calico/defaults/main.yml

@@ -13,8 +13,3 @@ calicoctl_image_tag: "{{ calico_version }}"
 
 calico_node_image_repo: calico/node
 calico_node_image_tag: "{{ calico_version }}"
-
-# Set to true if your Hyperkube has all required components to run
-# calico. This is required in order to run canalized calico.
-use_hyperkube_cni: false
-