diff --git a/synapse/replication/slave/storage/devices.py b/synapse/replication/slave/storage/devices.py
deleted file mode 100644
index 6fcade510a..0000000000
--- a/synapse/replication/slave/storage/devices.py
+++ /dev/null
@@ -1,79 +0,0 @@
-# Copyright 2016 OpenMarket Ltd
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-# http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-from typing import TYPE_CHECKING, Any, Iterable
-
-from synapse.replication.slave.storage._slaved_id_tracker import SlavedIdTracker
-from synapse.replication.tcp.streams._base import DeviceListsStream, UserSignatureStream
-from synapse.storage.database import DatabasePool, LoggingDatabaseConnection
-from synapse.storage.databases.main.devices import DeviceWorkerStore
-
-if TYPE_CHECKING:
- from synapse.server import HomeServer
-
-
-class SlavedDeviceStore(DeviceWorkerStore):
- def __init__(
- self,
- database: DatabasePool,
- db_conn: LoggingDatabaseConnection,
- hs: "HomeServer",
- ):
- self.hs = hs
-
- self._device_list_id_gen = SlavedIdTracker(
- db_conn,
- "device_lists_stream",
- "stream_id",
- extra_tables=[
- ("user_signature_stream", "stream_id"),
- ("device_lists_outbound_pokes", "stream_id"),
- ("device_lists_changes_in_room", "stream_id"),
- ],
- )
-
- super().__init__(database, db_conn, hs)
-
- def get_device_stream_token(self) -> int:
- return self._device_list_id_gen.get_current_token()
-
- def process_replication_rows(
- self, stream_name: str, instance_name: str, token: int, rows: Iterable[Any]
- ) -> None:
- if stream_name == DeviceListsStream.NAME:
- self._device_list_id_gen.advance(instance_name, token)
- self._invalidate_caches_for_devices(token, rows)
- elif stream_name == UserSignatureStream.NAME:
- self._device_list_id_gen.advance(instance_name, token)
- for row in rows:
- self._user_signature_stream_cache.entity_has_changed(row.user_id, token)
- return super().process_replication_rows(stream_name, instance_name, token, rows)
-
- def _invalidate_caches_for_devices(
- self, token: int, rows: Iterable[DeviceListsStream.DeviceListsStreamRow]
- ) -> None:
- for row in rows:
- # The entities are either user IDs (starting with '@') whose devices
- # have changed, or remote servers that we need to tell about
- # changes.
- if row.entity.startswith("@"):
- self._device_list_stream_cache.entity_has_changed(row.entity, token)
- self.get_cached_devices_for_user.invalidate((row.entity,))
- self._get_cached_user_device.invalidate((row.entity,))
- self.get_device_list_last_stream_id_for_remote.invalidate((row.entity,))
-
- else:
- self._device_list_federation_stream_cache.entity_has_changed(
- row.entity, token
- )
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