remove deprecation warning from SentenceWindowRetriever (#8720)

Author: anakin87

Diff for: haystack/components/retrievers/sentence_window_retriever.py

@@ -2,7 +2,6 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 
-import warnings
 from typing import Any, Dict, List, Optional
 
 from haystack import Document, component, default_from_dict, default_to_dict
@@ -93,13 +92,6 @@ def __init__(self, document_store: DocumentStore, window_size: int = 3):
         self.window_size = window_size
         self.document_store = document_store
 
-        warnings.warn(
-            "The output of `context_documents` will change in the next release. Instead of a "
-            "List[List[Document]], the output will be a List[Document], where the documents are ordered by "
-            "`split_idx_start`.",
-            DeprecationWarning,
-        )
-
     @staticmethod
     def merge_documents_text(documents: List[Document]) -> str:
         """