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: https://github.com/coreos/container-linux-update-operator/pull/197

addons/cluo/0-namespace.yaml

@@ -1,4 +0,0 @@
-apiVersion: v1
-kind: Namespace
-metadata:
-  name: reboot-coordinator

addons/cluo/cluster-role-binding.yaml

@@ -1,12 +0,0 @@
-apiVersion: rbac.authorization.k8s.io/v1
-kind: ClusterRoleBinding
-metadata:
-  name: reboot-coordinator
-roleRef:
-  apiGroup: rbac.authorization.k8s.io
-  kind: ClusterRole
-  name: reboot-coordinator
-subjects:
-  - kind: ServiceAccount
-    namespace: reboot-coordinator
-    name: default

addons/cluo/cluster-role.yaml

@@ -1,45 +0,0 @@
-apiVersion: rbac.authorization.k8s.io/v1
-kind: ClusterRole
-metadata:
-  name: reboot-coordinator
-rules:
-  - apiGroups:
-      - ""
-    resources:
-      - nodes
-    verbs:
-      - get
-      - list
-      - watch
-      - update
-  - apiGroups:
-      - ""
-    resources:
-      - configmaps
-    verbs:
-      - create
-      - get
-      - update
-      - list
-      - watch
-  - apiGroups:
-      - ""
-    resources:
-      - events
-    verbs:
-      - create
-      - watch
-  - apiGroups:
-      - ""
-    resources:
-      - pods
-    verbs:
-      - get
-      - list
-      - delete
-  - apiGroups:
-      - "extensions"
-    resources:
-      - daemonsets
-    verbs:
-      - get

addons/cluo/update-agent.yaml

@@ -1,68 +0,0 @@
-apiVersion: apps/v1
-kind: DaemonSet
-metadata:
-  name: container-linux-update-agent
-  namespace: reboot-coordinator
-spec:
-  updateStrategy:
-    type: RollingUpdate
-    rollingUpdate:
-      maxUnavailable: 1
-  selector:
-    matchLabels:
-      name: container-linux-update-agent
-  template:
-    metadata:
-      labels:
-        name: container-linux-update-agent
-      annotations:
-        seccomp.security.alpha.kubernetes.io/pod: 'docker/default'
-    spec:
-      tolerations:
-        - key: node-role.kubernetes.io/master
-          operator: Exists
-          effect: NoSchedule
-      containers:
-        - name: update-agent
-          image: quay.io/coreos/container-linux-update-operator:v0.7.0
-          command:
-            - "/bin/update-agent"
-          env:
-            # read by update-agent as the node name to manage reboots for
-            - name: UPDATE_AGENT_NODE
-              valueFrom:
-                fieldRef:
-                  fieldPath: spec.nodeName
-            - name: POD_NAMESPACE
-              valueFrom:
-                fieldRef:
-                  fieldPath: metadata.namespace
-          resources:
-            requests:
-              cpu: 10m
-              memory: 20Mi
-            limits:
-              cpu: 20m
-              memory: 40Mi
-          volumeMounts:
-            - mountPath: /var/run/dbus
-              name: var-run-dbus
-            - mountPath: /etc/coreos
-              name: etc-coreos
-            - mountPath: /usr/share/coreos
-              name: usr-share-coreos
-            - mountPath: /etc/os-release
-              name: etc-os-release
-      volumes:
-      - name: var-run-dbus
-        hostPath:
-          path: /var/run/dbus
-      - name: etc-coreos
-        hostPath:
-          path: /etc/coreos
-      - name: usr-share-coreos
-        hostPath:
-          path: /usr/share/coreos
-      - name: etc-os-release
-        hostPath:
-          path: /etc/os-release

addons/cluo/update-operator.yaml

@@ -1,39 +0,0 @@
-apiVersion: apps/v1
-kind: Deployment
-metadata:
-  name: container-linux-update-operator
-  namespace: reboot-coordinator
-spec:
-  replicas: 1
-  selector:
-    matchLabels:
-      name: container-linux-update-operator
-  template:
-    metadata:
-      labels:
-        name: container-linux-update-operator
-      annotations:
-        seccomp.security.alpha.kubernetes.io/pod: 'docker/default'
-    spec:
-      tolerations:
-      - key: node-role.kubernetes.io/master
-        operator: Exists
-        effect: NoSchedule
-      containers:
-        - name: update-operator
-          image: quay.io/coreos/container-linux-update-operator:v0.7.0
-          command:
-            - "/bin/update-operator"
-          env:
-            - name: POD_NAMESPACE
-              valueFrom:
-                fieldRef:
-                  fieldPath: metadata.namespace
-          resources:
-            requests:
-              cpu: 10m
-              memory: 20Mi
-            limits:
-              cpu: 20m
-              memory: 40Mi
-