Updating Copyright year and removing custom import.

Author: sauragrawal

mmv1/products/apigee/DnsZone.yaml

@@ -1,4 +1,4 @@
-# Copyright 2024 Google Inc.
+# Copyright 2025 Google Inc.
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
@@ -40,8 +40,6 @@ async:
     base_url: '{{op_id}}'
   result:
     resource_inside_response: true
-custom_code:
-  custom_import: 'templates/terraform/custom_import/apigee_dns_zone.go.tmpl'
 examples:
   - name: 'apigee_dns_zone_basic'
     exclude_test: true