message: Update snapshot_dataset_op.cc
diff: @@ -201,8 +201,6 @@ class SnapshotDatasetV2Op::Dataset::Iterator::Reader
  explicit Reader(const Params& params, int64 start_index);
  - ~Reader() override;
  -
  Status Initialize(IteratorContext* ctx) override;
  Status GetNextInternal(IteratorContext* ctx, std::vector<Tensor>* out_tensors,
  