chore: Remove hallo-haystack integration from Readme (#2925)

Author: bogdankostic

README.md

@@ -45,7 +45,6 @@ Please check out our [Contribution Guidelines](CONTRIBUTING.md) for all the deta
 | [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)                                   | **Archived** - use [google-genai-haystack](https://pypi.org/project/google-genai-haystack) instead                                                                                                                                                         |
 | [google-genai-haystack](integrations/google_genai/)                     | Embedder, Generator                   | [![PyPI - Version](https://img.shields.io/pypi/v/google-genai-haystack.svg)](https://pypi.org/project/google-genai-haystack)                             | [![Test / google-genai](https://github.com/deepset-ai/haystack-core-integrations/actions/workflows/google_genai.yml/badge.svg)](https://github.com/deepset-ai/haystack-core-integrations/actions/workflows/google_genai.yml)                               |
 | [google-vertex-haystack](integrations/google_vertex/)                   | Embedder, Generator                   | [![PyPI - Version](https://img.shields.io/pypi/v/google-vertex-haystack.svg)](https://pypi.org/project/google-vertex-haystack)                           | **Archived** - use [google-genai-haystack](https://pypi.org/project/google-genai-haystack) instead                                                                                                                                                         |
-| [hallo-haystack](integrations/hallo/) | Embedder | [![PyPI - Version](https://img.shields.io/pypi/v/hallo-haystack.svg)](https://pypi.org/project/hallo-haystack) | [![Test / hallo](https://github.com/deepset-ai/haystack-core-integrations/actions/workflows/hallo.yml/badge.svg)](https://github.com/deepset-ai/haystack-core-integrations/actions/workflows/hallo.yml) |
 | [hanlp-haystack](integrations/hanlp/)                                   | Preprocessor                | [![PyPI - Version](https://img.shields.io/pypi/v/hanlp-haystack.svg)](https://pypi.org/project/hanlp-haystack)                                           | [![Test / hanlp](https://github.com/deepset-ai/haystack-core-integrations/actions/workflows/hanlp.yml/badge.svg)](https://github.com/deepset-ai/haystack-core-integrations/actions/workflows/hanlp.yml)                                                    |
 | [jina-haystack](integrations/jina/)                                     | Connector, 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)                                           |