fix: Remove redundant LOG_FORMAT definition

Removed the second instance of the LOG_FORMAT definition in the chatbot script. The specific change was the removal of the line LOG_FORMAT = "%(asctime)s - %(levelname)s - %(message)s" which appeared twice consecutively. This correction helps maintain code clarity and conciseness.

examples/chatbot_with_streaming.py

@@ -32,8 +32,6 @@
     "/exit": {},
 }
 
-LOG_FORMAT = "%(asctime)s - %(levelname)s - %(message)s"
-
 logger = logging.getLogger("chatbot")