unset default logging file

mpsd-software-environment.py

@@ -32,7 +32,7 @@ config_vars = {
 }
 
 
-def set_up_logging(loglevel="warning", filename="test.log"):
+def set_up_logging(loglevel="warning", filename=None):
     """Set up logging.
 
     This function sets up the logging configuration for the script.