fix(llm): remove boolean casing normalization

Author: tshu-w

are/simulation/agents/llm/hf/hf_engine.py

@@ -149,5 +149,4 @@ def chat_completion(
             logger.error(f"{error_msg}. Message: {response.choices[0].message}")
             raise ValueError(error_msg)
 
-        content = content.replace("False", "false").replace("True", "true")
         return content, None

are/simulation/agents/llm/litellm/litellm_engine.py

@@ -122,7 +122,6 @@ def chat_completion(
             res = response.choices[0].message.content
             assert res is not None
 
-            res = res.replace("False", "false").replace("True", "true")
             for stop_token in stop_sequences:
                 res = res.split(stop_token)[0]