Simplify ReadFromCroissant by removing the pipeline argument and making it a PCollection.

PiperOrigin-RevId: 702731977

Author: marcenacp

tensorflow_datasets/core/dataset_builders/croissant_builder.py

@@ -288,6 +288,8 @@ def _split_generators(
       dl_manager: download.DownloadManager,
       pipeline: beam.Pipeline,
   ) -> dict[splits_lib.Split, split_builder_lib.SplitGenerator]:
+    del dl_manager  # unused
+    del pipeline  # unused
     # If a split recordset is joined for the required record set, we generate
     # splits accordingly. Otherwise, it generates a single `default` split with
     # all the records.
@@ -302,7 +304,6 @@ def _split_generators(
       split_key = split_reference.reference_field.references.field
       return {
           split[split_key]: self._generate_examples(
-              pipeline=pipeline,
               filters={
                   **self._filters,
                   split_reference.reference_field.id: split[split_key],
@@ -311,21 +312,15 @@ def _split_generators(
           for split in split_reference.split_record_set.data
       }
     else:
-      return {
-          'default': self._generate_examples(
-              pipeline=pipeline, filters=self._filters
-          )
-      }
+      return {'default': self._generate_examples(filters=self._filters)}
 
   def _generate_examples(
       self,
-      pipeline: beam.Pipeline,
       filters: dict[str, Any],
   ) -> beam.PTransform:
     """Generates the examples for the given record set.
 
     Args:
-      pipeline: The Beam pipeline.
       filters: A dict of filters to apply to the records. The keys should be
         field names and the values should be the values to filter by. If a
         record matches all the filters, it will be included in the dataset.
@@ -354,10 +349,12 @@ def convert_to_tfds_format(
           conversion_utils.to_tfds_value(record, features),
       )
 
-    return records.beam_reader(
-        pipeline=pipeline
-    ) | f'Convert to TFDS format for filters: {json.dumps(filters)}' >> beam.MapTuple(
-        convert_to_tfds_format,
-        features=self.info.features,
-        record_set_id=record_set.id,
+    return (
+        records.beam_reader()
+        | f'Convert to TFDS format for filters: {json.dumps(filters)}'
+        >> beam.MapTuple(
+            convert_to_tfds_format,
+            features=self.info.features,
+            record_set_id=record_set.id,
+        )
     )