Refactor imports and consolidate utility functions into utils.py; remove tools.py

app.py

@@ -1,6 +1,6 @@
 import gradio as gr
 from fetch_data import fetch_data
-from tools import reset_datafiles
+from utils import reset_datafiles
 
 theme = gr.themes.Soft(
     primary_hue="purple",

arvix.py

@@ -1,10 +1,6 @@
 import json
 import random
-import os
-import sys
 from bs4 import BeautifulSoup
-
-sys.path.append(os.path.dirname(os.path.abspath(__file__)) + "/../")
 import utils
 
 def fetch_new_page(category):

pmc.py

@@ -2,11 +2,7 @@ import json
 import xml.etree.ElementTree as ET
 from bs4 import BeautifulSoup
 import requests
-import os
-import sys
 import threading
-
-sys.path.append(os.path.dirname(os.path.abspath(__file__)) + "/../")
 import utils
 
 def fetch_links(category):