diff --git a/synapse/handlers/admin.py b/synapse/handlers/admin.py
index 5ff02c12b..e8a651e23 100644
--- a/synapse/handlers/admin.py
+++ b/synapse/handlers/admin.py
@@ -14,10 +14,6 @@
 # limitations under the License.
 
 import logging
-import os
-import tempfile
-
-from canonicaljson import json
 
 from twisted.internet import defer