reverting inadvertant changes to mistralai/llm.py

Author: vishal-seshagiri-infinitusai

livekit-plugins/livekit-plugins-mistralai/livekit/plugins/mistralai/llm.py

@@ -90,6 +90,9 @@ def chat(
         if is_given(tool_choice):
             extra["tool_choice"] = tool_choice
 
+        if is_given(response_format):
+            extra["response_format"] = response_format
+
         return LLMStream(
             self,
             model=self._opts.model,