Starting Imagen versions 1 and 2, image captioning, and visual question answering are deprecated

## Deprecate Starting on June 24, 2025, Imagen versions 1 and 2, image captioning, and visual question answering are deprecated. On September 24, 2025, the following features and models will be removed: * image captioning * visual question answering * Imagen 1 model `imagegeneration@002` * Imagen 2 models `imagegeneration@005` and `imagegeneration@006` For more information, see [Migrate to Imagen 3](https://cloud.google.com/release-notes/vertex-ai/generative-ai/docs/image/migrate-to-imagen-3). ## Deprecate The Generative AI module in the Vertex AI SDK is deprecated. For information about migrating to the Google Gen AI SDK, see the [migration guide](https://cloud.google.com/vertex-ai/generative-ai/docs/deprecations/genai-vertexai-sdk).