tfrecords docstring update

bob/learn/pytorch/datasets/tfrecord/tfrecord.py

@@ -103,6 +103,9 @@ class TFRecordDataset(IterableDataset):
     """
     Generic DataSet that reads multiple tfrecord files into a `IterableDataset`
 
+    .. warning::
+       THIS WILL BE CONVERTED TO USE THE TF API
+
     Parameters
     ----------
         path: list