diff --git a/synapse/handlers/_base.py b/synapse/handlers/_base.py
index f141e92ce2ff66cb8480ac1e2ae5b4a5ec494fc4..b37c8be96467e2c87efb8459c73fddbeefa0fe7e 100644
--- a/synapse/handlers/_base.py
+++ b/synapse/handlers/_base.py
@@ -35,7 +35,7 @@ class BaseRoomHandler(BaseHandler):
                            extra_users=[]):
         snapshot.fill_out_prev_events(event)
 
-        store_id = yield self.store.persist_event(event)
+        yield self.store.persist_event(event)
 
         destinations = set(extra_destinations)
         # Send a PDU to all hosts who have joined the room.
diff --git a/synapse/handlers/federation.py b/synapse/handlers/federation.py
index 220dbbb3a9db1cd596342de90feb80eaa3da32bd..606e1f18176d4ccf9ff1fc8c4a30b8728f39a87c 100644
--- a/synapse/handlers/federation.py
+++ b/synapse/handlers/federation.py
@@ -22,8 +22,6 @@ from synapse.api.constants import Membership
 from synapse.util.logutils import log_function
 from synapse.federation.pdu_codec import PduCodec
 
-from synapse.api.errors import AuthError
-
 from twisted.internet import defer
 
 import logging
@@ -146,7 +144,7 @@ class FederationHandler(BaseHandler):
 
         else:
             with (yield self.room_lock.lock(event.room_id)):
-                store_id = yield self.store.persist_event(event, backfilled)
+                yield self.store.persist_event(event, backfilled)
 
             room = yield self.store.get_room(event.room_id)
 
diff --git a/synapse/handlers/typing.py b/synapse/handlers/typing.py
index 9d38a7336e1edc9f582a106b255e7d92812cb6ed..9fab0ff37c7d5868350f4e1ca525d49fe06d8045 100644
--- a/synapse/handlers/typing.py
+++ b/synapse/handlers/typing.py
@@ -17,11 +17,12 @@ from twisted.internet import defer
 
 from ._base import BaseHandler
 
+from synapse.api.errors import SynapseError, AuthError
+
 import logging
 
 from collections import namedtuple
 
-
 logger = logging.getLogger(__name__)
 
 
diff --git a/synapse/server.py b/synapse/server.py
index ade8dc6c15d9eb24a377cce1d740c5f72eae2fb5..3e72b2bcd5480df57bc4d1959ee4b83913875a2f 100644
--- a/synapse/server.py
+++ b/synapse/server.py
@@ -126,11 +126,6 @@ class BaseHomeServer(object):
         object."""
         return UserID.from_string(s, hs=self)
 
-    def parse_roomid(self, s):
-        """Parse the string given by 's' as a Room ID and return a RoomID
-        object."""
-        return RoomID.from_string(s, hs=self)
-
     def parse_roomalias(self, s):
         """Parse the string given by 's' as a Room Alias and return a RoomAlias
         object."""