core[patch]: For now remove user warning (langchain-ai#20321)

Remove warning since it creates a lot of noise.

libs/core/langchain_core/messages/ai.py

@@ -1,4 +1,3 @@
-import warnings
 from typing import Any, Dict, List, Literal
 
 from langchain_core.messages.base import (
@@ -57,12 +56,6 @@ def _backwards_compat_tool_calls(cls, values: dict) -> dict:
             or values.get("tool_call_chunks")
         )
         if raw_tool_calls and not tool_calls:
-            warnings.warn(
-                "New langchain packages are available that more efficiently handle "
-                "tool calling. Please upgrade your packages to versions that set "
-                "message tool calls. e.g., `pip install --upgrade langchain-anthropic"
-                "`, pip install--upgrade langchain-openai`, etc."
-            )
             try:
                 if issubclass(cls, AIMessageChunk):  # type: ignore
                     values["tool_call_chunks"] = default_tool_chunk_parser(