From 31dbf77009455b1afa8664d6f90bde9bfde56a73 2011-04-10 19:35:11
From: Thomas Kluyver <takowl@gmail.com>
Date: 2011-04-10 19:35:11
Subject: [PATCH] Remove superfluous import.

---

diff --git a/IPython/core/history.py b/IPython/core/history.py
index 4ffdd54..2967003 100644
--- a/IPython/core/history.py
+++ b/IPython/core/history.py
@@ -22,7 +22,6 @@ import sqlite3
 import threading
 
 from collections import defaultdict
-from contextlib import nested
 
 # Our own packages
 from IPython.config.configurable import Configurable