diff --git a/src/allmydata/storage/http_server.py b/src/allmydata/storage/http_server.py
index d76948d93..47fac879f 100644
--- a/src/allmydata/storage/http_server.py
+++ b/src/allmydata/storage/http_server.py
@@ -10,9 +10,7 @@ from base64 import b64decode
 import binascii
 from tempfile import TemporaryFile
 from os import SEEK_END, SEEK_SET
-from io import BytesIO
 import mmap
-import sys
 
 from cryptography.x509 import Certificate as CryptoCertificate
 from zope.interface import implementer