imports cleanup

app/celery/tasks.py

@@ -1,16 +1,12 @@
 import json
-from collections import defaultdict, namedtuple
 from datetime import datetime
 
 from flask import current_app
-from notifications_utils.insensitive_dict import InsensitiveDict
-from notifications_utils.postal_address import PostalAddress
 from notifications_utils.recipients import RecipientCSV
-from notifications_utils.timezones import convert_utc_to_local_timezone
 from requests import HTTPError, RequestException, request
 from sqlalchemy.exc import IntegrityError, SQLAlchemyError
 
-from app import create_random_identifier, create_uuid, encryption, notify_celery
+from app import create_uuid, encryption, notify_celery
 from app.aws import s3
 from app.celery import provider_tasks
 from app.config import QueueNames
@@ -18,10 +14,8 @@ from app.dao.inbound_sms_dao import dao_get_inbound_sms_by_id
 from app.dao.jobs_dao import dao_get_job_by_id, dao_update_job
 from app.dao.notifications_dao import (
     dao_get_last_notification_added_for_job_id,
-    dao_get_notification_history_by_reference,
     dao_update_notifications_by_reference,
     get_notification_by_id,
-    update_notification_status_by_reference,
 )
 from app.dao.returned_letters_dao import insert_or_update_returned_letters
 from app.dao.service_email_reply_to_dao import dao_get_reply_to_by_id
@@ -29,28 +23,20 @@ from app.dao.service_inbound_api_dao import get_service_inbound_api_for_service
 from app.dao.service_sms_sender_dao import dao_get_service_sms_senders_by_id
 from app.dao.templates_dao import dao_get_template_by_id
 from app.models import (
-    DVLA_RESPONSE_STATUS_SENT,
     EMAIL_TYPE,
     JOB_STATUS_CANCELLED,
     JOB_STATUS_FINISHED,
     JOB_STATUS_IN_PROGRESS,
     JOB_STATUS_PENDING,
     KEY_TYPE_NORMAL,
-    LETTER_TYPE,
-    NOTIFICATION_CREATED,
-    NOTIFICATION_DELIVERED,
     NOTIFICATION_RETURNED_LETTER,
-    NOTIFICATION_SENDING,
-    NOTIFICATION_TECHNICAL_FAILURE,
-    NOTIFICATION_TEMPORARY_FAILURE,
     SMS_TYPE,
-    DailySortedLetter,
 )
 from app.notifications.process_notifications import persist_notification
 from app.notifications.validators import check_service_over_daily_message_limit
 from app.serialised_models import SerialisedService, SerialisedTemplate
 from app.service.utils import service_allowed_to_send_to
-from app.utils import DATETIME_FORMAT, get_reference_from_personalisation
+from app.utils import DATETIME_FORMAT
 from app.v2.errors import TooManyRequestsError