TST: Remove unnecessary instance attr assignments.
TST: Remove unnecessary instance attr assignments.

humdings/zipline,nborggren/zipline,chrjxj/zipline,florentchandelier/zipline,wilsonkichoi/zipline,MonoCloud/zipline,YuepengGuo/zipline,otmaneJai/Zipline,wilsonkichoi/zipline,florentchandelier/zipline,sketchytechky/zipline,grundgruen/zipline,magne-max/zipline-ja,enigmampc/catalyst,MonoCloud/zipline,jimgoo/zipline-fork,grundgruen/zipline,Scapogo/zipline,YuepengGuo/zipline,sketchytechky/zipline,dmitriz/zipline,jimgoo/zipline-fork,enigmampc/catalyst,bartosh/zipline,ChinaQuants/zipline,dmitriz/zipline,umuzungu/zipline,chrjxj/zipline,humdings/zipline,alphaBenj/zipline,bartosh/zipline,Scapogo/zipline,quantopian/zipline,quantopian/zipline,CDSFinance/zipline,CDSFinance/zipline,umuzungu/zipline,magne-max/zipline-ja,nborggren/zipline,alphaBenj/zipline,otmaneJai/Zipline,ChinaQuants/zipline