Refactor imports in app.py to streamline dependencies

app.py

@@ -11,10 +11,9 @@ Environment
 export SERPER_API_KEY="YOUR‑KEY‑HERE"
 """
 
-import os, json, asyncio, httpx, trafilatura, gradio as gr
+import os, asyncio, httpx, trafilatura, gradio as gr
 from dateutil import parser as dateparser
-from pathlib import Path
-from limits import RateLimitItem, parse
+from limits import parse
 from limits.aio.storage import MemoryStorage
 from limits.aio.strategies import MovingWindowRateLimiter
 from fastapi import FastAPI, Request, HTTPException