1 files changed, 4 insertions, 16 deletions
diff --git a/synapse/storage/__init__.py b/synapse/storage/__init__.py
index 0460fe8cc9..ec89f645d4 100644
--- a/synapse/storage/__init__.py
+++ b/synapse/storage/__init__.py
@@ -17,10 +17,10 @@
 """
 The storage layer is split up into multiple parts to allow Synapse to run
 against different configurations of databases (e.g. single or multiple
-databases). The `data_stores` are classes that talk directly to a single
-database and have associated schemas, background updates, etc. On top of those
-there are (or will be) classes that provide high level interfaces that combine
-calls to multiple `data_stores`.
+databases). The `Database` class represents a single physical database. The
+`data_stores` are classes that talk directly to a `Database` instance and have
+associated schemas, background updates, etc. On top of those there are classes
+that provide high level interfaces that combine calls to multiple `data_stores`.
 
 There are also schemas that get applied to every database, regardless of the
 data stores associated with them (e.g. the schema version tables), which are
@@ -49,15 +49,3 @@ class Storage(object):
         self.persistence = EventsPersistenceStorage(hs, stores)
         self.purge_events = PurgeEventsStorage(hs, stores)
         self.state = StateGroupStorage(hs, stores)
-
-
-def are_all_users_on_domain(txn, database_engine, domain):
-    sql = database_engine.convert_param_style(
-        "SELECT COUNT(*) FROM users WHERE name NOT LIKE ?"
-    )
-    pat = "%:" + domain
-    txn.execute(sql, (pat,))
-    num_not_matching = txn.fetchall()[0][0]
-    if num_not_matching == 0:
-        return True
-    return False