Minor fix to data loader script

xsum.py

@@ -44,7 +44,7 @@ class Xsum(datasets.GeneratorBasedBuilder):
 
     BUILDER_CONFIGS = [
         datasets.BuilderConfig(
-            name=lang,
+            name="xsum",
             version=datasets.Version("1.0.0"),
             description="",
         )
@@ -91,7 +91,7 @@ class Xsum(datasets.GeneratorBasedBuilder):
             for challenge_split, filename in challenge_sets 	
         ]
 
-    def _generate_examples(self, filepath, split, filepaths=None, lang=None):
+    def _generate_examples(self, filepath, split, filepaths=None):
         """Yields examples."""
         if "challenge" in split:
             if "covid" in split: