ENH: Remove all writing functionality from AssetFinder
ENH: Remove all writing functionality from AssetFinder

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