diff --git a/config/webhook/kustomization.yaml b/config/webhook/kustomization.yaml
index 4e6732d9810..fe7a9cf4c6f 100644
--- a/config/webhook/kustomization.yaml
+++ b/config/webhook/kustomization.yaml
@@ -3,6 +3,3 @@ kind: Kustomization
 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 39a1cc6f211..00000000000
--- a/config/webhook/kustomizeconfig.yaml
+++ /dev/null
@@ -1,26 +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
-