org_score: Úklid v importech

mo/web/org_score.py

-import decimal
 from flask import g, render_template, request
 from flask.helpers import flash, url_for
-from typing import Iterable, List, Optional, Tuple, Union
+from typing import List, Optional, Union
 from flask_wtf.form import FlaskForm
-import json
 import werkzeug.exceptions
 from werkzeug.utils import redirect
 import wtforms