diff --git a/flask/app.py b/flask/app.py
index 151525e6..9b6b7836 100644
--- a/flask/app.py
+++ b/flask/app.py
@@ -11,7 +11,6 @@
 
 from __future__ import with_statement
 
-import os
 from threading import Lock
 from datetime import timedelta, datetime
 from itertools import chain
@@ -20,7 +19,7 @@ from jinja2 import Environment
 
 from werkzeug import ImmutableDict
 from werkzeug.routing import Map, Rule
-from werkzeug.exceptions import HTTPException, InternalServerError, NotFound
+from werkzeug.exceptions import HTTPException, InternalServerError
 
 from .helpers import _PackageBoundObject, url_for, get_flashed_messages, \
     _tojson_filter, _endpoint_from_view_func
diff --git a/flask/helpers.py b/flask/helpers.py
index 39214a10..a2d951b4 100644
--- a/flask/helpers.py
+++ b/flask/helpers.py
@@ -15,7 +15,6 @@ import posixpath
 import mimetypes
 from time import time
 from zlib import adler32
-from functools import wraps
 
 # try to load the best simplejson implementation available.  If JSON
 # is not installed, we add a failing class.