Allow cache back-end to provide #delete or #del.
Allow cache back-end to provide #delete or #del.

eugenehp/ruby-geocoder,guavapass/geocoder,gogovan/geocoder-olleh,andreamazz/geocoder,jgrciv/geocoder,tiramizoo/geocoder,jaigouk/geocoder-olleh,rdlugosz/geocoder,mdebo/geocoder,tortuba/geocoder,mveer99/geocoder,rios1993/geocoder,boone/geocoder,malandrina/geocoder,moofish32/geocoder,sideci-sample/sideci-sample-geocoder,ivanzotov/geocoder,donbobka/geocoder,alexreisner/geocoder,aceunreal/geocoder,crdunwel/geocoder,rayzeller/geocoder,GermanDZ/geocoder,AndyDangerous/geocoder,3mundi/geocoder,ankane/geocoder,Devetzis/geocoder,jaigouk/geocoder-olleh,davydovanton/geocoder,sjaveed/geocoder,StudioMelipone/geocoder,sr-education/geocoder,mehlah/geocoder,TrangPham/geocoder,FanaHOVA/geocoder,brian-ewell/geocoder,epyatopal/geocoder,gogovan/geocoder-olleh