trivial: remove unused import -- thanks, pyflakes

diff --git a/src/allmydata/immutable/layout.py b/src/allmydata/immutable/layout.py
index 99f5bcbeaec40904fbfdaa96c56380b29e858537..f1e4161785391768279314e75d56d4f58a81560a 100644 (file)
--- a/src/allmydata/immutable/layout.py
+++ b/src/allmydata/immutable/layout.py
@@ -4,7 +4,7 @@ from twisted.internet import defer
 from allmydata.interfaces import IStorageBucketWriter, IStorageBucketReader, \
      FileTooLargeError, HASH_SIZE
 from allmydata.util import mathutil, idlib
-from allmydata.util.assertutil import _assert, precondition
+from allmydata.util.assertutil import precondition
 from allmydata import storage
 
 class LayoutInvalid(Exception):