remove tool calls from stream generation info

Author: YouNeedCryDear

libs/oci/langchain_oci/chat_models/oci_generative_ai.py

@@ -253,10 +253,6 @@ def chat_stream_generation_info(self, event_data: Dict) -> Dict[str, Any]:
             "citations": event_data.get("citations"),
             "finish_reason": event_data.get("finishReason"),
         }
-        if self.chat_stream_tool_calls(event_data):
-            generation_info["tool_calls"] = self.format_stream_tool_calls(
-                self.chat_stream_tool_calls(event_data)
-            )
         # Remove keys with None values
         return {k: v for k, v in generation_info.items() if v is not None}