diff --git a/config/webhook/kustomization.yaml b/config/webhook/kustomization.yaml
index 9cf26134e4..36d4cc6e40 100644
--- a/config/webhook/kustomization.yaml
+++ b/config/webhook/kustomization.yaml
@@ -1,6 +1,3 @@
 resources:
 - manifests.yaml
 - service.yaml
-
-configurations:
-- kustomizeconfig.yaml
diff --git a/config/webhook/kustomizeconfig.yaml b/config/webhook/kustomizeconfig.yaml
deleted file mode 100644
index 25e21e3c96..0000000000
--- a/config/webhook/kustomizeconfig.yaml
+++ /dev/null
@@ -1,25 +0,0 @@
-# the following config is for teaching kustomize where to look at when substituting vars.
-# It requires kustomize v2.1.0 or newer to work properly.
-nameReference:
-- kind: Service
-  version: v1
-  fieldSpecs:
-  - kind: MutatingWebhookConfiguration
-    group: admissionregistration.k8s.io
-    path: webhooks/clientConfig/service/name
-  - kind: ValidatingWebhookConfiguration
-    group: admissionregistration.k8s.io
-    path: webhooks/clientConfig/service/name
-
-namespace:
-- kind: MutatingWebhookConfiguration
-  group: admissionregistration.k8s.io
-  path: webhooks/clientConfig/service/namespace
-  create: true
-- kind: ValidatingWebhookConfiguration
-  group: admissionregistration.k8s.io
-  path: webhooks/clientConfig/service/namespace
-  create: true
-
-varReference:
-- path: metadata/annotations