code: @Override
      public DeleteVirtualMFADeviceResult deleteVirtualMFADevice(DeleteVirtualMFADeviceRequest request) {
          request = beforeClientExecution(request);
          return executeDeleteVirtualMFADevice(request);
      }
docs: <p>
  Deletes a virtual MFA device.
  </p>
  <note>
  <p>
  You must deactivate a user's virtual MFA device before you can delete it. For information about deactivating MFA
  devices, see <a>DeactivateMFADevice</a>.
  </p>
  </note>
  
  @param deleteVirtualMFADeviceRequest
  @return Result of the DeleteVirtualMFADevice operation returned by the service.
  @throws NoSuchEntityException
  The request was rejected because it referenced a resource entity that does not exist. The error message
  describes the resource.
  @throws DeleteConflictException
  The request was rejected because it attempted to delete a resource that has attached subordinate
  entities. The error message describes these entities.
  @throws LimitExceededException
  The request was rejected because it attempted to create resources beyond the current AWS account limits.
  The error message describes the limit exceeded.
  @throws ServiceFailureException
  The request processing has failed because of an unknown error, exception or failure.
  @sample AmazonIdentityManagement.DeleteVirtualMFADevice
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/iam-2010-05-08/DeleteVirtualMFADevice" target="_top">AWS API
  Documentation</a>