Clean up dead environment config

otc/dev.t09.de/stacks/observability/victoria-k8s-stack/manifests/vmauth.yaml

@@ -1,17 +0,0 @@
-apiVersion: operator.victoriametrics.com/v1beta1
-kind: VMUser
-metadata:
-  name: simple-user
-  namespace: observability
-spec:
-  username: simple-user
-  passwordRef:
-    key: password
-    name: simple-user-secret
-  targetRefs:
-    - static:
-        url: http://vmsingle-o12y:8429
-      paths: ["/api/v1/write"]
-    - static:
-        url: http://vlogs-victorialogs:9428
-      paths: ["/insert/elasticsearch/.*"]