diff --git a/app/dao/daily_sorted_letter_dao.py b/app/dao/daily_sorted_letter_dao.py
deleted file mode 100644
index 720eddf38..000000000
--- a/app/dao/daily_sorted_letter_dao.py
+++ /dev/null
@@ -1,38 +0,0 @@
-from datetime import datetime
-
-from sqlalchemy.dialects.postgresql import insert
-
-from app import db
-from app.dao.dao_utils import autocommit
-from app.models import DailySortedLetter
-
-
-def dao_get_daily_sorted_letter_by_billing_day(billing_day):
-    return DailySortedLetter.query.filter_by(
-        billing_day=billing_day
-    ).first()
-
-
-@autocommit
-def dao_create_or_update_daily_sorted_letter(new_daily_sorted_letter):
-    '''
-    This uses the Postgres upsert to avoid race conditions when two threads try and insert
-    at the same row. The excluded object refers to values that we tried to insert but were
-    rejected.
-    http://docs.sqlalchemy.org/en/latest/dialects/postgresql.html#insert-on-conflict-upsert
-    '''
-    table = DailySortedLetter.__table__
-    stmt = insert(table).values(
-        billing_day=new_daily_sorted_letter.billing_day,
-        file_name=new_daily_sorted_letter.file_name,
-        unsorted_count=new_daily_sorted_letter.unsorted_count,
-        sorted_count=new_daily_sorted_letter.sorted_count)
-    stmt = stmt.on_conflict_do_update(
-        index_elements=[table.c.billing_day, table.c.file_name],
-        set_={
-            'unsorted_count': stmt.excluded.unsorted_count,
-            'sorted_count': stmt.excluded.sorted_count,
-            'updated_at': datetime.utcnow()
-        }
-    )
-    db.session.connection().execute(stmt)
diff --git a/tests/app/dao/test_daily_sorted_letter_dao.py b/tests/app/dao/test_daily_sorted_letter_dao.py
deleted file mode 100644
index a762fc8bc..000000000
--- a/tests/app/dao/test_daily_sorted_letter_dao.py
+++ /dev/null
@@ -1,55 +0,0 @@
-from datetime import date
-
-from app.dao.daily_sorted_letter_dao import (
-    dao_create_or_update_daily_sorted_letter,
-    dao_get_daily_sorted_letter_by_billing_day,
-)
-from app.models import DailySortedLetter
-from tests.app.db import create_daily_sorted_letter
-
-
-def test_dao_get_daily_sorted_letter_by_billing_day(notify_db_session):
-    billing_day = date(2018, 2, 1)
-    other_day = date(2017, 9, 8)
-
-    daily_sorted_letters = create_daily_sorted_letter(billing_day=billing_day)
-
-    assert dao_get_daily_sorted_letter_by_billing_day(billing_day) == daily_sorted_letters
-    assert not dao_get_daily_sorted_letter_by_billing_day(other_day)
-
-
-def test_dao_create_or_update_daily_sorted_letter_creates_a_new_entry(notify_db_session):
-    billing_day = date(2018, 2, 1)
-    dsl = DailySortedLetter(billing_day=billing_day,
-                            file_name="Notify-201802011234.rs.txt",
-                            unsorted_count=2,
-                            sorted_count=0)
-    dao_create_or_update_daily_sorted_letter(dsl)
-
-    daily_sorted_letter = dao_get_daily_sorted_letter_by_billing_day(billing_day)
-
-    assert daily_sorted_letter.billing_day == billing_day
-    assert daily_sorted_letter.unsorted_count == 2
-    assert daily_sorted_letter.sorted_count == 0
-    assert not daily_sorted_letter.updated_at
-
-
-def test_dao_create_or_update_daily_sorted_letter_updates_an_existing_entry(
-    notify_db_session
-):
-    create_daily_sorted_letter(billing_day=date(2018, 1, 18),
-                               file_name="Notify-20180118123.rs.txt",
-                               unsorted_count=2,
-                               sorted_count=3)
-
-    dsl = DailySortedLetter(billing_day=date(2018, 1, 18),
-                            file_name="Notify-20180118123.rs.txt",
-                            unsorted_count=5,
-                            sorted_count=17)
-    dao_create_or_update_daily_sorted_letter(dsl)
-
-    daily_sorted_letter = dao_get_daily_sorted_letter_by_billing_day(dsl.billing_day)
-
-    assert daily_sorted_letter.unsorted_count == 5
-    assert daily_sorted_letter.sorted_count == 17
-    assert daily_sorted_letter.updated_at