fix: remove get_theory_topics inputs

app.py

@@ -15,10 +15,9 @@ with gr.Blocks(title="Quantum Circuits Learning Programme") as demo:
     
     with gr.Tabs():
         with gr.TabItem("Browse Topics"):
-            topics_input = gr.Textbox(label="Enter query (or leave empty)", placeholder="Optional: enter a search term")
             topics_output = gr.JSON(label="Available Topics")
             topics_btn = gr.Button("Load Available Topics")
-            topics_btn.click(fn=get_theory_topics, inputs=topics_input, outputs=topics_output)
+            topics_btn.click(fn=get_theory_topics, outputs=topics_output)
             
         with gr.TabItem("Learn Theory"):
             topic_input = gr.Textbox(