Do not try to extract non-compressed data files

fashion_mnist_corrupted.py

@@ -89,7 +89,7 @@ class FashionMnistCorrupted(datasets.GeneratorBasedBuilder):
         urls_to_download = {
             key: _URL + fname for key, fname in _URLS.items()
         }
-        downloaded_files = dl_manager.download_and_extract(urls_to_download)
+        downloaded_files = dl_manager.download(urls_to_download)
 
         return [
             datasets.SplitGenerator(