We have included the whole AWS SDK for historical reasons, but we are currently evaluating narrowing down the list to just the required dependencies in a future release of Pro. I suspect this work will be prioritized in Q1, but please poke for updates. The subset of what we need from the SDK is essentially S3, DynamoDB, KMS, SNS, EC2, ELB, CloudWatch, IAM, and CF. You could attempt to narrow down the list yourself if you can't wait until we pick this work up. I may be forgetting something and if I am please do circle back with what you find as you might expedite our audit :).