rename preview as validation

dataset.yaml

@@ -1,10 +1,9 @@
 configs:
   - config_name: default
     data_files:
-    - split: preview
+    - split: validation
       path: "preview.parquet"
     - split: train
       path: "train.parquet"
     - split: test
-      path: "test.parquet"
-    name: methyl-classification
+      path: "test.parquet"

methyl-classification.py

@@ -1,18 +0,0 @@
-from datasets import DatasetDict, Dataset, load_dataset, GeneratorBasedBuilder
-import pandas as pd
-
-class MethylClassification(GeneratorBasedBuilder):
-    def _info(self):
-        return self._info_from_pandas(pd.read_parquet("preview.parquet"))
-
-    def _split_generators(self, dl_manager):
-        data_files = self.config.data_files
-        return [
-            self._generate_split(name, data_files[name])
-            for name in data_files
-        ]
-
-    def _generate_examples(self, split_name, filepath):
-        df = pd.read_parquet(filepath)
-        for i, row in df.iterrows():
-            yield i, row.to_dict()