Perform the following to remove or deactivate credentials:

1. Login to the AWS Management Console
2. Click Services
3. Click IAM
4. Click on Users
5. Click on Security Credentials
6. As an Administrator
   1. Click on Make Inactive for credentials that have not been used in 90 Days
7. As an IAM User

Click on Make Inactive or Delete for credentials which have not been used in 90 Days