chore: remove unused imports

app/dao/fact_notification_status_dao.py

@@ -1,7 +1,6 @@
 from datetime import datetime, time, timedelta
 
 from flask import current_app
-from notifications_utils.timezones import convert_local_timezone_to_utc
 from sqlalchemy import Date, case, func
 from sqlalchemy.dialects.postgresql import insert
 from sqlalchemy.sql.expression import extract, literal

app/dao/notifications_dao.py

@@ -55,7 +55,6 @@
 from app.utils import (
     escape_special_characters,
     get_local_timezone_midnight_in_utc,
-    midnight_n_days_ago,
 )