Update app.py

app.py

@@ -3,8 +3,7 @@ from gpt4all import GPT4All
 from urllib.request import urlopen
 import json
 import time
-from load_llms import (format_html_string, model_choices, 
-                       llm_intro, model_cache, load_model)
+from load_llms import model_choices, llm_intro, load_model
 
 
 # populate all models available from GPT4All