MAINT: Remove unused functions.
MAINT: Remove unused functions.

Found no references to these functions, so remove.

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