aws rds remove-role-from-db-instance
Disassociates an Amazon Web Services Identity and Access Management (IAM) role from a DB instance. AWS CLI reference
3 options Its page in the AWS CLI reference
Options
--db-instance-identifierThe name of the DB instance to disassociate the IAM role from.--feature-nameThe name of the feature for the DB instance that the IAM role is to be disassociated from.--role-arnThe Amazon Resource Name (ARN) of the IAM role to disassociate from the DB instance, for example, arn:aws:iam::123456789012:role/AccessRole.