禁用Winston的详细启动日志

Question

当我的应用启动时，winston会记录所有内容，例如

winston:create-logger Define prototype method for "error"
winston:create-logger Define prototype method for "warn"
winston:create-logger Define prototype method for "info"
winston:create-logger Define prototype method for "http"
winston:create-logger Define prototype method for "verbose"
winston:create-logger Define prototype method for "debug"
winston:create-logger Define prototype method for "silly"
winston:file written true false
winston:file stat done: combined.log
...lots more

如何禁用此功能？