TChannelConnectionBase: trivial cleanup
TChannelConnectionBase: trivial cleanup

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