Update backends/aws/README.md

Co-authored-by: Billy Rowell <williamrowell@users.noreply.github.com>

backends/aws/README.md

@@ -105,11 +105,6 @@ From the directory where your `agc-project.yaml` is located, run:
 
 The running workflow can be monitored via [`agc workflow` commands](https://aws.github.io/amazon-genomics-cli/docs/reference/agc_workflow/), or via the AWS console.
 
-### Running via Workbench
-
-1. [Register the engine in Workbench](https://docs.dnastack.com/docs/connecting-to-a-workflow-engine)
-2. [Follow the instructions in the README to run the workflow via Workbench](../../README.md#run-using-workbench)
-
 # Reference data hosted in AWS
 
 AWS reference data is hosted in the `us-west-2` region in the bucket `s3://dnastack-resources`.