Remove un-necessary conditional.

openedx/core/lib/logsettings.py

@@ -18,7 +18,7 @@ def get_logger_config(log_dir,
                       syslog_addr=None,
                       local_loglevel='INFO',
                       console_loglevel=None,
-                      service_variant=None):
+                      service_variant=""):
 
     """
 
@@ -43,11 +43,6 @@ def get_logger_config(log_dir,
     if console_loglevel is None or console_loglevel not in LOG_LEVELS:
         console_loglevel = 'INFO'
 
-    if service_variant is None:
-        # default to a blank string so that if SERVICE_VARIANT is not
-        # set we will not log to a sub directory
-        service_variant = ''
-
     hostname = platform.node().split(".")[0]
     syslog_format = ("[service_variant={service_variant}]"
                      "[%(name)s][env:{logging_env}] %(levelname)s "