Deprecate dataset (#4)

- Raise deprecation warning (8a9744e6d355a00ca83e38e681615f39abcaaa56)
- Add deprecation disclaimer to dataset card (d06de296b500e6515e980ef4a56dd3883990bd62)
- Disable viewer (7fb442fa3ecc79699c4dad335311feaee473c913)

README.md

@@ -21,6 +21,7 @@ task_ids:
 - language-modeling
 - masked-language-modeling
 paperswithcode_id: c4
+viewer: false
 dataset_info:
 - config_name: en
   features:
@@ -92,6 +93,10 @@ dataset_info:
   dataset_size: 6722216056851
 ---
 
+<div class="course-tip course-tip-orange bg-gradient-to-br dark:bg-gradient-to-r before:border-orange-500 dark:before:border-orange-800 from-orange-50 dark:from-gray-900 to-white dark:to-gray-950 border border-orange-50 text-orange-700 dark:text-gray-400">
+  <p><b>Deprecated:</b> Dataset "c4" is deprecated and will be deleted. Use "<a href="https://huggingface.co/datasets/allenai/c4">allenai/c4</a>" instead.</p>
+</div>
+
 # Dataset Card for C4
 
 ## Table of Contents

c4.py

@@ -3,6 +3,7 @@
 
 import gzip
 import json
+import warnings
 
 import datasets
 
@@ -49,6 +50,10 @@ class C4(datasets.GeneratorBasedBuilder):
     BUILDER_CONFIGS = [datasets.BuilderConfig(name) for name in _VARIANTS]
 
     def _info(self):
+        warnings.warn(
+            "Dataset 'c4' is deprecated and will be deleted. Use 'allenai/c4' instead.",
+            FutureWarning,
+        )
         return datasets.DatasetInfo(
             description=_DESCRIPTION,
             features=datasets.Features(