diff --git a/pkgs/google_generative_ai/lib/src/vertex_hooks.dart b/pkgs/google_generative_ai/lib/src/vertex_hooks.dart
index 12e9350..007007e 100644
--- a/pkgs/google_generative_ai/lib/src/vertex_hooks.dart
+++ b/pkgs/google_generative_ai/lib/src/vertex_hooks.dart
@@ -22,8 +22,7 @@ export 'api.dart'
         countTokensResponseFields,
         createCountTokensResponse,
         parseBatchEmbedContentsResponse,
-        parseGenerateContentResponse,
         parseCountTokensResponse,
         parseEmbedContentResponse,
-        UsageMetadata;
+        parseGenerateContentResponse;
 export 'model.dart' show createModelWithBaseUri;