chore: regenerate google-api-core with librarian

Author: jskeet

packages/google-api-core/.repo-metadata.json

@@ -1,12 +1,10 @@
 {
-    "name": "google-api-core",
-    "name_pretty": "Google API client core library",
     "client_documentation": "https://googleapis.dev/python/google-api-core/latest",
-    "release_level": "stable",
+    "distribution_name": "google-api-core",
     "language": "python",
     "library_type": "CORE",
-    "repo": "googleapis/google-cloud-python",
-    "distribution_name": "google-api-core",
-    "default_version": "",
-    "codeowner_team": "@googleapis/cloud-sdk-python-team"
-}
+    "name": "google-api-core",
+    "name_pretty": "Google API client core library",
+    "release_level": "stable",
+    "repo": "googleapis/google-cloud-python"
+}