add req

app.py

@@ -14,7 +14,7 @@ load_dotenv()
 # Add path to the root of the repo to the system path
 sys.path.append(".")
 
-from rag import _build_vector_db, retrieval_augmented_qa_pipeline, RetrievalAugmentedQAPipeline
+from rag import _build_vector_db, RetrievalAugmentedQAPipeline
 
 # ChatOpenAI Templates
 system_template = """You are a helpful assistant who always speaks in a pleasant tone!