Change gql logging without creating a variable

Co-authored-by: Mathis Ribet <[email protected]>

gitlab2rbac.py

@@ -17,8 +17,7 @@
     level=environ.get("LOGLEVEL", "INFO").upper(),
 )
 
-logger = logging.getLogger("gql")
-logger.setLevel(logging.WARNING)
+logging.getLogger("gql").setLevel(logging.WARNING)
 
 
 class GitlabHelper(object):