code: public ServiceFuture<Void> deleteAtManagementGroupAsync(String policyDefinitionName, String managementGroupId, final ServiceCallback<Void> serviceCallback) {
          return ServiceFuture.fromResponse(deleteAtManagementGroupWithServiceResponseAsync(policyDefinitionName, managementGroupId), serviceCallback);
      }
docs: Deletes a policy definition at management group level.
  
  @param policyDefinitionName The name of the policy definition to delete.
  @param managementGroupId The ID of the management group.
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object