prevent creating dupliacted log handler and remove unused

log.py

@@ -2,9 +2,10 @@ import logging
 
 
 def getlogger():
-    # create a custom logger
+    # create a custom logger if no log handler
     logger = logging.getLogger(__name__)
-
+    if not logger.hasHandlers():
+        logger.setLevel(logging.INFO)
         # create handlers
         warn_handler = logging.StreamHandler()
         info_handler = logging.StreamHandler()

main.py

@@ -1,8 +1,6 @@
 import asyncio
 import json
 import os
-import signal
-from functools import partial
 from bot import Bot
 from log import getlogger
 
@@ -53,6 +51,4 @@ async def main():
 
 if __name__ == "__main__":
     logger.info("matrix chatgpt bot start.....")
-    print("matrix chatgpt bot start.....")
     asyncio.run(main())
-