remove the old rdoc readme
remove the old rdoc readme

airbrake/airbrake,square/hoptoad_notifier,thoughtbot/airbrake,CarlosCD/airbrake,benjaminoakes/airbrake,nick-desteffen/airbrake,Shopify/airbrake,nick-desteffen/airbrake,airbrake/airbrake,stevecrozz/hydraulic_brake,thoughtbot/hoptoad_notifier,CarlosCD/airbrake