Remove double printing of log (#2033)

* Fix double logging in log() function 

Co-authored-by: Kevin Chung <kchung@ctfd.io>

CTFd/utils/logging/__init__.py

@@ -16,5 +16,4 @@ def log(logger, format, **kwargs):
     }
     props.update(kwargs)
     msg = format.format(**props)
-    print(msg)
     logger.info(msg)