[Fix]移除Singleton的单例模式实现
[Fix]移除Singleton的单例模式实现

wisfern/vnpy,msincenselee/vnpy,rrrrrr8/vnpy,andrewchenshx/vnpy,msincenselee/vnpy,msincenselee/vnpy,harveywwu/vnpy,msincenselee/vnpy,vnpy/vnpy,wisfern/vnpy,andrewchenshx/vnpy,harveywwu/vnpy,bigdig/vnpy,bigdig/vnpy,bigdig/vnpy,vnpy/vnpy,harveywwu/vnpy,harveywwu/vnpy,bigdig/vnpy,rrrrrr8/vnpy,wisfern/vnpy,andrewchenshx/vnpy,wisfern/vnpy,rrrrrr8/vnpy,andrewchenshx/vnpy,wisfern/vnpy,rrrrrr8/vnpy,andrewchenshx/vnpy,wisfern/vnpy,rrrrrr8/vnpy,harveywwu/vnpy,harveywwu/vnpy,rrrrrr8/vnpy