TChannelEndpointHandler: drop support for streaming arg1
TChannelEndpointHandler: drop support for streaming arg1

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