Remove hack as graceful Close is done.
Remove hack as graceful Close is done.

i/tchannel,bunnyblue/tchannel,hustxiaoc/tchannel,vanloswang/tchannel,bunnyblue/tchannel,savaki/tchannel,benfleis/tchannel,vanloswang/tchannel,hustxiaoc/tchannel,RyanTech/tchannel,benfleis/tchannel,chenwenbin928/tchannel,Zirpon/tchannel,savaki/tchannel,i/tchannel,vanloswang/tchannel,benfleis/tchannel,Zirpon/tchannel,RyanTech/tchannel,chenwenbin928/tchannel,hustxiaoc/tchannel,chenwenbin928/tchannel,Zirpon/tchannel,bunnyblue/tchannel,sasa233/tchannel,sasa233/tchannel,savaki/tchannel,sasa233/tchannel,i/tchannel,RyanTech/tchannel