REFACTOR(postgresql): remove bitnami pg after

- successful migr...
All applications (gitea, jaejadle, todo, mas, umami) have been
successfully
migrated to CloudNativePG. All databases verified working on CNPG
cluster.

postgresql/kustomization.yaml

@@ -1,10 +0,0 @@
-apiVersion: kustomize.config.k8s.io/v1beta1
-kind: Kustomization
-
-resources:
-  # ArgoCD Application 리소스는 infrastructure/kustomization.yaml에서 관리
-  # - argocd/postgresql.yaml
-  # - argocd/postgres-exporter.yaml
-  # - argocd/postgres-exporter-read-0.yaml
-  # - argocd/postgres-exporter-read-1.yaml
-  - vault/postgresql-password.yaml