chore: remove Open WebUI and unused OpenClaw k8s resources

- Deleted open-webui namespace, deployment, service, ingress, and PVC
  from cluster (replaced by OpenClaw using Claude API)
- Removed openclaw PVC and RBAC manifests no longer needed
- Removed Uptime Kuma monitor for chat.chemavx.xyz

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

openclaw/pvc-openclaw-pvc.yaml

@@ -1,20 +0,0 @@
-apiVersion: v1
-kind: PersistentVolumeClaim
-metadata:
-  annotations:
-    kubectl.kubernetes.io/last-applied-configuration: '{"apiVersion":"v1","kind":"PersistentVolumeClaim","metadata":{"annotations":{},"name":"openclaw-pvc","namespace":"openclaw"},"spec":{"accessModes":["ReadWriteOnce"],"resources":{"requests":{"storage":"20Gi"}},"storageClassName":"local-path","volumeName":"openclaw-pv"}}
-
-      '
-    pv.kubernetes.io/bind-completed: 'yes'
-  name: openclaw-pvc
-  namespace: openclaw
-spec:
-  accessModes:
-  - ReadWriteOnce
-  resources:
-    requests:
-      storage: 20Gi
-  storageClassName: local-path
-  volumeMode: Filesystem
-  volumeName: openclaw-pv
-

openclaw/rbac-openclaw-agent.yaml

@@ -1,36 +0,0 @@
----
-apiVersion: v1
-kind: ServiceAccount
-metadata:
-  name: openclaw-agent
-  namespace: openclaw
-
----
-apiVersion: rbac.authorization.k8s.io/v1
-kind: ClusterRole
-metadata:
-  name: openclaw-agent-readonly
-rules:
-- apiGroups: [""]
-  resources: [pods, pods/log, services, nodes, namespaces, events]
-  verbs: [get, list, watch]
-- apiGroups: [apps]
-  resources: [deployments, replicasets, statefulsets, daemonsets]
-  verbs: [get, list, watch]
-- apiGroups: [networking.k8s.io]
-  resources: [ingresses]
-  verbs: [get, list, watch]
-
----
-apiVersion: rbac.authorization.k8s.io/v1
-kind: ClusterRoleBinding
-metadata:
-  name: openclaw-agent-readonly-binding
-roleRef:
-  apiGroup: rbac.authorization.k8s.io
-  kind: ClusterRole
-  name: openclaw-agent-readonly
-subjects:
-- kind: ServiceAccount
-  name: openclaw-agent
-  namespace: openclaw