treasuremap/manifests/type/airship-core/shared/encrypt-secrets/cleanup/patch.yaml

apiVersion: builtin
kind: PatchTransformer
metadata:
  name: delete-encryption-secrets
target:
 kind: ConfigMap
 name: .+-encryption-keys
patch: |
  apiVersion: not-important
  kind: not-important
  metadata:
    name: not-important
  $patch: delete