in provisioning_lambda/clients/iot.py [0:0]
def delete_policy_versions(self, policy_name):
response = self.client.list_policy_versions(policyName=policy_name)
for pv in response['policyVersions']:
if pv['isDefaultVersion'] is False:
self.client.delete_policy_version(policyName=policy_name, policyVersionId=pv['versionId'])