Delete send-scheduled-notifications task

This was added a few years ago, but never used.

app/celery/scheduled_tasks.py

@@ -25,8 +25,6 @@ from app.dao.jobs_dao import (
 )
 from app.dao.jobs_dao import dao_update_job
 from app.dao.notifications_dao import (
-    dao_get_scheduled_notifications,
-    set_scheduled_notification_to_processed,
     notifications_not_yet_sent,
     dao_precompiled_letters_still_pending_virus_check,
     dao_old_letters_with_created_status,
@@ -62,21 +60,6 @@ def run_scheduled_jobs():
         raise
 
 
-@notify_celery.task(name='send-scheduled-notifications')
-@statsd(namespace="tasks")
-def send_scheduled_notifications():
-    try:
-        scheduled_notifications = dao_get_scheduled_notifications()
-        for notification in scheduled_notifications:
-            send_notification_to_queue(notification, notification.service.research_mode)
-            set_scheduled_notification_to_processed(notification.id)
-        current_app.logger.info(
-            "Sent {} scheduled notifications to the provider queue".format(len(scheduled_notifications)))
-    except SQLAlchemyError:
-        current_app.logger.exception("Failed to send scheduled notifications")
-        raise
-
-
 @notify_celery.task(name="delete-verify-codes")
 @statsd(namespace="tasks")
 def delete_verify_codes():

app/dao/notifications_dao.py

@@ -33,7 +33,6 @@ from app.models import (
     Notification,
     NotificationHistory,
     ProviderDetails,
-    ScheduledNotification,
     KEY_TYPE_NORMAL,
     KEY_TYPE_TEST,
     LETTER_TYPE,
@@ -652,26 +651,6 @@ def dao_created_scheduled_notification(scheduled_notification):
     db.session.commit()
 
 
-@statsd(namespace="dao")
-def dao_get_scheduled_notifications():
-    notifications = Notification.query.join(
-        ScheduledNotification
-    ).filter(
-        ScheduledNotification.scheduled_for < datetime.utcnow(),
-        ScheduledNotification.pending).all()
-
-    return notifications
-
-
-def set_scheduled_notification_to_processed(notification_id):
-    db.session.query(ScheduledNotification).filter(
-        ScheduledNotification.notification_id == notification_id
-    ).update(
-        {'pending': False}
-    )
-    db.session.commit()
-
-
 def dao_get_total_notifications_sent_per_day_for_performance_platform(start_date, end_date):
     """
     SELECT