fix(codeql): remove unused imports in router_clean.py (#116)

Removes:
- typing.Any, typing.Dict, typing.List (unused)
- fastapi.HTTPException (unused)
- fastapi.responses.JSONResponse (unused)

Closes CodeQL alerts #21, #42, #43

Author: Neiland85

app/backoffice/router_clean.py

@@ -7,11 +7,10 @@
 from decimal import Decimal
 from enum import Enum
 import random
-from typing import Any, Dict, List
 import uuid
 
-from fastapi import APIRouter, HTTPException, Request
-from fastapi.responses import HTMLResponse, JSONResponse
+from fastapi import APIRouter, Request
+from fastapi.responses import HTMLResponse
 from fastapi.templating import Jinja2Templates
 from pydantic import BaseModel, Field