Remove all instances of "from builtins import str"

Delete "from builtins import str" rather than just comment out

.cache/v/cache/lastfailed

@@ -0,0 +1 @@
+{}

python/lsst/pipe/tasks/ingest.py

@@ -1,5 +1,4 @@
 from __future__ import print_function
-from builtins import str
 from past.builtins import basestring
 from builtins import object
 import os

python/lsst/pipe/tasks/ingestCalibs.py

@@ -1,5 +1,4 @@
 from builtins import zip
-from builtins import str
 import collections
 import datetime
 import itertools

python/lsst/pipe/tasks/interpImage.py

@@ -1,4 +1,3 @@
-from builtins import str
 #
 # LSST Data Management System
 # Copyright 2008-2015 AURA/LSST.

python/lsst/pipe/tasks/matchBackgrounds.py

@@ -1,5 +1,5 @@
 from builtins import zip
-from builtins import str
+#from builtins import str
 from builtins import range
 from builtins import object
 #