wlog/journald: don't set a default identifier

Don't set the identifier to "winpr" as default value because journald
will use the programs name as default if no identifier is set.
This way a program using WLog doesn't need to set an identifier (except
it want something different then it's name).

winpr/libwinpr/utils/wlog/JournaldAppender.c

@@ -196,12 +196,6 @@ wLogAppender* WLog_JournaldAppender_New(wLog* log)
 		if (!WLog_JournaldAppender_Open(log, (wLogAppender *)appender))
 			goto error_open;
 	}
-	else
-	{
-		appender->identifier = _strdup("winpr");
-		if (!appender->identifier)
-			goto error_env_malloc;
-	}
 
 	return (wLogAppender *)appender;