STY: Removed unused import.
STY: Removed unused import.

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