Removes unused test class member and corresponding import.
Removes unused test class member and corresponding import.

Leased sockets is from an older architecture.

zhoulingjun/zipline,CDSFinance/zipline,Scapogo/zipline,DVegaCapital/zipline,alphaBenj/zipline,nborggren/zipline,sketchytechky/zipline,humdings/zipline,dhruvparamhans/zipline,florentchandelier/zipline,ChinaQuants/zipline,magne-max/zipline-ja,wubr2000/zipline,iamkingmaker/zipline,dkushner/zipline,morrisonwudi/zipline,bartosh/zipline,jimgoo/zipline-fork,michaeljohnbennett/zipline,stkubr/zipline,gwulfs/zipline,dmitriz/zipline,euri10/zipline,davidastephens/zipline,MonoCloud/zipline,Scapogo/zipline,semio/zipline,cmorgan/zipline,alphaBenj/zipline,morrisonwudi/zipline,CDSFinance/zipline,erikness/AlephOne,joequant/zipline,quantopian/zipline,joequant/zipline,ronalcc/zipline,humdings/zipline,mattcaldwell/zipline,CarterBain/AlephNull,magne-max/zipline-ja,chrjxj/zipline,StratsOn/zipline,aajtodd/zipline,YuepengGuo/zipline,mattcaldwell/zipline,keir-rex/zipline,AlirezaShahabi/zipline,kmather73/zipline,wilsonkichoi/zipline,CarterBain/AlephNull,nborggren/zipline,zhoulingjun/zipline,cmorgan/zipline,michaeljohnbennett/zipline,dhruvparamhans/zipline,StratsOn/zipline,jordancheah/zipline,gwulfs/zipline,euri10/zipline,otmaneJai/Zipline,dkushner/zipline,chrjxj/zipline,davidastephens/zipline,umuzungu/zipline,otmaneJai/Zipline,quantopian/zipline,enigmampc/catalyst,semio/zipline,grundgruen/zipline,YuepengGuo/zipline,erikness/AlephOne,sketchytechky/zipline,aajtodd/zipline,umuzungu/zipline,MonoCloud/zipline,florentchandelier/zipline,bartosh/zipline,jimgoo/zipline-fork,dmitriz/zipline,DVegaCapital/zipline,AlirezaShahabi/zipline,wilsonkichoi/zipline,keir-rex/zipline,ChinaQuants/zipline,grundgruen/zipline,ronalcc/zipline,enigmampc/catalyst,jordancheah/zipline,wubr2000/zipline,kmather73/zipline,stkubr/zipline,iamkingmaker/zipline