Update imports, disable caching in datasets library

app.py

@@ -9,10 +9,9 @@ from pathlib import Path
 from sys import stderr
 from typing import TypedDict, Self, Any, Callable
 
-from datasets import Dataset
+from datasets import Dataset, disable_caching
 from datasets.search import FaissIndex
 import faiss
-from faiss.contrib.ondisk import merge_ondisk
 import gradio as gr
 import requests
 from sentence_transformers import SentenceTransformer
@@ -240,6 +239,8 @@ def main():
     k = get_env_var("K", int, default=20)  # TODO: can't go higher than 20 yet
     mailto = get_env_var("MAILTO", str, None)
 
+    disable_caching()  # disable caching in the datasets library
+
     normalize, model = get_model(model_name, dir, trust_remote_code)
     index = get_index(dir, search_time_s)