fix import

app.py

@@ -149,16 +149,12 @@ with demo:
     gr.Markdown(INTRODUCTION_TEXT, elem_classes="markdown-text")
 
     with gr.Row():
-        with gr.Column():
-            with gr.Accordion("📙 Citation", open=False):
-                citation_button = gr.Textbox(
-                    value=CITATION_BUTTON_TEXT,
-                    label=CITATION_BUTTON_LABEL,
-                    elem_id="citation-button",
-                ).style(show_copy_button=True)
-        with gr.Column():
-            with gr.Accordion("✨ CHANGELOG", open=False):
-                changelog = gr.Markdown(CHANGELOG_TEXT, elem_id="changelog-text")
+        with gr.Accordion("📙 Citation", open=False):
+            citation_button = gr.Textbox(
+                value=CITATION_BUTTON_TEXT,
+                label=CITATION_BUTTON_LABEL,
+                elem_id="citation-button",
+            ).style(show_copy_button=True)
 
     with gr.Tab("Results: Level 1"):
         leaderboard_table_1 = gr.components.Dataframe(