Removed legacy code related to hard-coding stack info
Removed legacy code related to hard-coding stack info

andersondias/FuelSDK-Ruby,Privy/FuelSDK-Ruby,ExactTarget/FuelSDK-Ruby,Shopify/FuelSDK-Ruby,jshorty/FuelSDK-Ruby,Vestorly/FuelSDK-Ruby,kev5873/FuelSDK-Ruby,salesforce-marketingcloud/FuelSDK-Ruby,salesforcefuel/FuelSDK-Ruby,iGoDigital-LLC/FuelSDK-Ruby