fix image similarity detection

src/streamlit_app.py

@@ -199,7 +199,5 @@ if uploaded_file:
             similar_img = data[int(idx)]['image']
             st.image(similar_img, caption=f"Similarity: {score:.3f}", use_container_width=True)
             st.markdown(f"**Case description:** {data[int(idx)]['complaints']}")
-else:
-    st.write("no image")
 
 st.caption("This chatbot is for educational purposes only and does not provide medical advice.")