STY: Remove unused import.
STY: Remove unused import.

Mea culpa.

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