feat: remove gradient integration (#926)

.github/labeler.yml

@@ -44,11 +44,6 @@ integration:google-vertex:
       - any-glob-to-any-file: "integrations/google_vertex/**/*"
       - any-glob-to-any-file: ".github/workflows/google_vertex.yml"
 
-integration:gradient:
-  - changed-files:
-      - any-glob-to-any-file: "integrations/gradient/**/*"
-      - any-glob-to-any-file: ".github/workflows/gradient.yml"
-
 integration:instructor-embedders:
   - changed-files:
       - any-glob-to-any-file: "integrations/instructor_embedders/**/*"

README.md

@@ -35,7 +35,6 @@ Please check out our [Contribution Guidelines](CONTRIBUTING.md) for all the deta
 | [fastembed-haystack](integrations/fastembed/)                                                                  | Embedder            | [![PyPI - Version](https://img.shields.io/pypi/v/fastembed-haystack.svg)](https://pypi.org/project/fastembed-haystack/)                                  | [![Test / fastembed](https://github.com/deepset-ai/haystack-core-integrations/actions/workflows/fastembed.yml/badge.svg)](https://github.com/deepset-ai/haystack-core-integrations/actions/workflows/fastembed.yml)                                  |
 | [google-ai-haystack](integrations/google_ai/)                                                                  | Generator           | [![PyPI - Version](https://img.shields.io/pypi/v/google-ai-haystack.svg)](https://pypi.org/project/google-ai-haystack)                                   | [![Test / google-ai](https://github.com/deepset-ai/haystack-core-integrations/actions/workflows/google_ai.yml/badge.svg)](https://github.com/deepset-ai/haystack-core-integrations/actions/workflows/google_ai.yml)                                  |
 | [google-vertex-haystack](integrations/google_vertex/)                                                          | Generator           | [![PyPI - Version](https://img.shields.io/pypi/v/google-vertex-haystack.svg)](https://pypi.org/project/google-vertex-haystack)                           | [![Test / google-vertex](https://github.com/deepset-ai/haystack-core-integrations/actions/workflows/google_vertex.yml/badge.svg)](https://github.com/deepset-ai/haystack-core-integrations/actions/workflows/google_vertex.yml)                      |
-| [gradient-haystack](integrations/gradient/)                                                                    | Embedder, Generator | [![PyPI - Version](https://img.shields.io/pypi/v/gradient-haystack.svg)](https://pypi.org/project/gradient-haystack)                                     | [![Test / gradient](https://github.com/deepset-ai/haystack-core-integrations/actions/workflows/gradient.yml/badge.svg)](https://github.com/deepset-ai/haystack-core-integrations/actions/workflows/gradient.yml)                                     |
 | [instructor-embedders-haystack](integrations/instructor_embedders/)                                            | Embedder            | [![PyPI - Version](https://img.shields.io/pypi/v/instructor-embedders-haystack.svg)](https://pypi.org/project/instructor-embedders-haystack)             | [![Test / instructor-embedders](https://github.com/deepset-ai/haystack-core-integrations/actions/workflows/instructor_embedders.yml/badge.svg)](https://github.com/deepset-ai/haystack-core-integrations/actions/workflows/instructor_embedders.yml) |
 | [jina-haystack](integrations/jina/)                                                                            | Embedder, Ranker    | [![PyPI - Version](https://img.shields.io/pypi/v/jina-haystack.svg)](https://pypi.org/project/jina-haystack)                                             | [![Test / jina](https://github.com/deepset-ai/haystack-core-integrations/actions/workflows/jina.yml/badge.svg)](https://github.com/deepset-ai/haystack-core-integrations/actions/workflows/jina.yml)                                                 |
 | [langfuse-haystack](integrations/langfuse/)                                                                    | Tracer              | [![PyPI - Version](https://img.shields.io/pypi/v/langfuse-haystack.svg?color=orange)](https://pypi.org/project/langfuse-haystack)                        | [![Test / langfuse](https://github.com/deepset-ai/haystack-core-integrations/actions/workflows/langfuse.yml/badge.svg)](https://github.com/deepset-ai/haystack-core-integrations/actions/workflows/langfuse.yml)                                     |