chg: Follow best practices and remove the logging handler.

Fixes: #717
Reference: https://docs.python.org/3/howto/logging.html#configuring-logging-for-a-library
Documentation: https://docs.python.org/3/howto/logging.html

pymisp/__init__.py

@@ -3,14 +3,7 @@ import logging
 import sys
 import warnings
 
-FORMAT = "%(levelname)s [%(filename)s:%(lineno)s - %(funcName)s() ] %(message)s"
-formatter = logging.Formatter(FORMAT)
-default_handler = logging.StreamHandler()
-default_handler.setFormatter(formatter)
-
 logger = logging.getLogger(__name__)
-logger.addHandler(default_handler)
-logger.setLevel(logging.WARNING)
 
 
 def warning_2022():