diff --git a/synapse/storage/databases/main/relations.py b/synapse/storage/databases/main/relations.py
index 69666e379cec..8789bb095387 100644
--- a/synapse/storage/databases/main/relations.py
+++ b/synapse/storage/databases/main/relations.py
@@ -29,20 +29,12 @@
 from synapse.api.constants import RelationTypes
 from synapse.events import EventBase
 from synapse.storage._base import SQLBaseStore
-from synapse.storage.database import (
-    DatabasePool,
-    LoggingDatabaseConnection,
-    LoggingTransaction,
-    make_in_list_sql_clause,
-)
+from synapse.storage.database import LoggingTransaction, make_in_list_sql_clause
 from synapse.storage.databases.main.stream import generate_pagination_where_clause
 from synapse.storage.engines import PostgresEngine
 from synapse.types import JsonDict, RoomStreamToken, StreamToken
 from synapse.util.caches.descriptors import cached, cachedList
 
-if TYPE_CHECKING:
-    from synapse.server import HomeServer
-
 logger = logging.getLogger(__name__)