Remove Container Linux Update Operator (CLUO) addon

* Stop providing example manifests for the Container Linux
Update Operator (CLUO)
* CLUO requires patches to support Kubernetes v1.16+, but the
project and push access is rather unowned
* CLUO hasn't been in active use in our clusters and won't be
relevant beyond Container Linux. Not to say folks can't patch
it and run it on their own. Examples just aren't provided here

Related: coreos/container-linux-update-operator#197

Author: dghubble

CHANGES.md

@@ -49,6 +49,8 @@ Notable changes between versions.
   * Update node-exporter from v0.18.1 to [v1.0.0-rc.0](https://github.com/prometheus/node_exporter/releases/tag/v1.0.0-rc.0)
 * Update Grafana from v6.6.1 to v6.6.2
   * Refresh Grafana dashboards
+* Remove Container Linux Update Operator (CLUO) addon
+  * CLUO doesn't support Kubernetes v1.16+, hasn't been in active use, and won't be relevant beyond Container Linux
 
 ## v1.17.3
 

addons/cluo/0-namespace.yaml

@@ -2,7 +2,6 @@
 
 Every Typhoon cluster is verified to work well with several post-install addons.
 
-* [CLUO](cluo.md) (Container Linux only)
 * Nginx [Ingress Controller](ingress.md)
 * [Prometheus](prometheus.md)
 * [Grafana](grafana.md)

addons/cluo/cluster-role-binding.yaml

@@ -170,9 +170,6 @@ kube-system   kube-scheduler-ip-10-0-3-155              1/1    Running   1
 
 Learn about [maintenance](/topics/maintenance/) and [addons](/addons/overview/).
 
-!!! note
-    On Container Linux clusters, install the `CLUO` addon to coordinate reboots and drains when nodes auto-update. Otherwise, updates may not be applied until the next reboot.
-
 ## Variables
 
 Check the [variables.tf](https://github.com/poseidon/typhoon/blob/master/aws/container-linux/kubernetes/variables.tf) source.

addons/cluo/cluster-role.yaml

@@ -176,9 +176,6 @@ kube-system   kube-scheduler-ramius-controller-0          1/1    Running   0
 
 Learn about [maintenance](/topics/maintenance/) and [addons](/addons/overview/).
 
-!!! note
-    On Container Linux clusters, install the `CLUO` addon to coordinate reboots and drains when nodes auto-update. Otherwise, updates may not be applied until the next reboot.
-
 ## Variables
 
 Check the [variables.tf](https://github.com/poseidon/typhoon/blob/master/azure/container-linux/kubernetes/variables.tf) source.