Revert "Sort by average_score"

This reverts commit d57645c9f7ac10f012b8ef4501a8b65ae0713358.

server.py

@@ -198,7 +198,6 @@ class LeaderboardServer:
                 if key in dataframe.columns
             ]
             dataframe = dataframe[df_order]
-            dataframe = dataframe.sort("average_score")
             attributes_map_word_to_header = {key: value["abbreviation"] for key, value in self.tasks_metadata.items()}
             attributes_map_word_to_header.update(extra_attributes_map_word_to_header)
             attributes_map_word_to_header.update(visible_metrics_map_word_to_header)