Changes to List Email Domains

removed the STEEP_LEARNING_DISABLED enum value from the error/code response property for the response status 401

removed the STEEP_LEARNING_DISABLED enum value from the error/code response property for the response status 403

removed the STEEP_LEARNING_DISABLED enum value from the error/code response property for the response status 404

removed the STEEP_LEARNING_DISABLED enum value from the error/code response property for the response status 405

removed the STEEP_LEARNING_DISABLED enum value from the error/code response property for the response status 422

removed the STEEP_LEARNING_DISABLED enum value from the error/code response property for the response status 500