Revert commit 97f53f2 because it has no effect

commit "Try to solve freeze after sort table and change category"
commit 97f53f2a4f44478a1c8f5f834cae9d661672483e.

app.py

@@ -144,7 +144,7 @@ def fetch_model_detail(submission_id):
     )
 
 def change_leaderboard_category(category):
-    return gr.DataFrame(
+    return gr.update(
         value=leaderboard_server.get_leaderboard(category=category),
         visible=True,
         datatype="markdown",