AWS CLI delete policies including all versions (requires jq)

delete-policies.sh

#!/bin/bash
set -euxo pipefail;

policies=$(cat ./policies.txt); # A new-line separated list of policy ARNs

for policy in $policies; do
  policiesVersions="$(aws iam list-policy-versions --policy-arn "$policy" | jq -r ".Versions[] | select(.IsDefaultVersion == false) | .VersionId")";
  for pv in $policiesVersions; do
    aws iam delete-policy-version --policy-arn "$policy" --version-id $pv;
  done;
  aws iam delete-policy --policy-arn "$policy";
done;

exit 0;