message: Remove the unused private tf method.
diff: @@ -55,11 +55,6 @@ def register_loss_scale_wrapper(optimizer_cls, wrapper_cls):
  _REGISTERED_WRAPPER_OPTIMIZER_CLS[optimizer_cls] = wrapper_cls
  -# TODO(reedwm): Remove this.
  -def _register_wrapper_optimizer_cls(optimizer_cls, wrapper_optimizer_cls):
  - register_loss_scale_wrapper(optimizer_cls, wrapper_optimizer_cls)
  -
  -
  def _wrap_optimizer(opt, loss_scale, use_v1_behavior):
  """Wraps an optimizer with a LossScaleOptimizer."""
  