message: remove redundant line in fused batch norm
diff: @@ -112,7 +112,6 @@ struct FusedBatchNorm<CPUDevice, T> {
  batch_var.device(d) = variance * rest_size_adjust;
  saved_var.device(d) = variance;
  } else {
  - mean.device(d) = estimated_mean;
  variance.device(d) = estimated_variance;
  }
  