Remove definitions of AWS AMI with nesting
What does this MR do?
Removes definitions of the nesting AMI for AWS.
Why was this MR needed?
That configuration was moved to a dedicated project at https://gitlab.com/gitlab-org/ci-cd/shared-runners/images/aws/macos-nesting, with AMI building automated with CI.
What's the best way to test this MR?
What are the relevant issue numbers?
Edited by Tomasz Maczukin