Remove usage of deprecated TensorInfo.dtype call.

PiperOrigin-RevId: 521972189

Author: abhijitkundu

tensorflow_datasets/core/features/feature.py

@@ -122,7 +122,7 @@ def copy_from(cls, tensor_info: TensorInfo) -> TensorInfo:
     """Copy constructor."""
     return cls(
         shape=tensor_info.shape,
-        dtype=tensor_info.dtype,
+        dtype=tensor_info.np_dtype,
         default_value=tensor_info.default_value,
         sequence_rank=tensor_info.sequence_rank,
         dataset_lvl=tensor_info.dataset_lvl,