Now Use AWS IAM to Delete a Service-Linked Role When You No Longer Require an AWS Service to Perform Actions on Your Behalf

Earlier this year, AWS Identity and Access Management (IAM) introduced service-linked roles, which provide you an easy and secure way to delegate permissions to many AWS services. Today, AWS IAM added support for deletion of service-linked roles through the AWS IAM console and API/CLI. This will enable you to revoke permissions from an AWS service to create and manage AWS resources in your account.
Quelle: aws.amazon.com