chore: regenerate google-cloud-billing with librarian

Author: jskeet

packages/google-cloud-billing/.repo-metadata.json

@@ -1,16 +1,15 @@
 {
-  "api_description": "allows developers to manage their billing accounts or browse the catalog of SKUs and pricing.",
-  "api_id": "cloudbilling.googleapis.com",
-  "api_shortname": "cloudbilling",
-  "client_documentation": "https://cloud.google.com/python/docs/reference/cloudbilling/latest",
-  "default_version": "v1",
-  "distribution_name": "google-cloud-billing",
-  "issue_tracker": "",
-  "language": "python",
-  "library_type": "GAPIC_AUTO",
-  "name": "cloudbilling",
-  "name_pretty": "Cloud Billing",
-  "product_documentation": "https://cloud.google.com/billing",
-  "release_level": "stable",
-  "repo": "googleapis/google-cloud-python"
+    "api_description": "allows developers to manage their billing accounts or browse the catalog of SKUs and pricing.",
+    "api_id": "cloudbilling.googleapis.com",
+    "api_shortname": "cloudbilling",
+    "client_documentation": "https://cloud.google.com/python/docs/reference/cloudbilling/latest",
+    "default_version": "v1",
+    "distribution_name": "google-cloud-billing",
+    "language": "python",
+    "library_type": "GAPIC_AUTO",
+    "name": "cloudbilling",
+    "name_pretty": "Cloud Billing",
+    "product_documentation": "https://cloud.google.com/billing",
+    "release_level": "stable",
+    "repo": "googleapis/google-cloud-python"
 }