Fix: Remove invalid multi-line Python code in Dockerfile RUN instruction

Dockerfile

@@ -25,16 +25,8 @@ COPY app.py model_server.py ./
 RUN mkdir -p .streamlit
 COPY .streamlit/config.toml .streamlit/ 2>/dev/null || true
 
-# Download model weights at build time (if using HF_TOKEN)
+# Set environment variable for model download
 ENV HF_TOKEN=""
-RUN python -c "
-import os
-if os.getenv('HF_TOKEN'):
-    # Model weights are downloaded when the app first runs
-    print('HF_TOKEN configured for model download')
-else:
-    print('Warning: HF_TOKEN not set. Model will be downloaded on first app run.')
-" || true
 
 # Expose Streamlit port
 EXPOSE 7860