remove unused MontoPersist
remove unused MontoPersist

bitemyapp/persistent,mitchellwrosen/persistent,pseudonom/persistent,mkscrg/persistent,yesodweb/persistent,mitchellwrosen/persistent,andrewthad/persistent,jasonzoladz/persistent,erikd/persistent,jcristovao/persistent,junjihashimoto/persistent,paul-rouse/persistent,nakaji-dayo/persistent,mkscrg/persistent,rdnetto/persistent,superduper/persistent,meteficha/persistent,gbwey/persistent,andrewthad/persistent,gbwey/persistent,jasonzoladz/persistent,pseudonom/persistent,greydot/persistent,meteficha/persistent,psibi/persistent,andrewthad/persistent,naushadh/persistent,gbwey/persistentold,nakaji-dayo/persistent,meteficha/persistent,jasonzoladz/persistent,jcristovao/persistent,gbwey/persistentold,jcristovao/persistent,superduper/persistent,nakaji-dayo/persistent,junjihashimoto/persistent,superduper/persistent,greydot/persistent,creichert/persistent,greydot/persistent,rdnetto/persistent,mkscrg/persistent,gbwey/persistent,mitchellwrosen/persistent,plow-technologies/persistent