conn: remove duplicate method definition
conn: remove duplicate method definition

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