Remove ununsed httplib2 requirement

This is not needed anymore since the logging is handled by
six.moves/httplib.

Change-Id: I4315860648258fb760ea22ca09d0083d7c9afb6c
Closes-Bug: #1266584

heatclient/shell.py

@@ -17,7 +17,6 @@ Command-line interface to the Heat API.
 from __future__ import print_function
 
 import argparse
-import httplib2
 import logging
 import six
 import sys
@@ -278,8 +277,6 @@ class HeatShell(object):
                 format="%(levelname)s (%(module)s:%(lineno)d) %(message)s",
                 level=logging.DEBUG)
 
-            httplib2.debuglevel = 1
-
     def _setup_verbose(self, verbose):
         if verbose:
             exc.verbose = 1

heatclient/tests/test_shell.py

@@ -18,7 +18,6 @@ import sys
 import yaml
 
 import fixtures
-import httplib2
 import tempfile
 import testscenarios
 import testtools
@@ -271,11 +270,6 @@ class ShellTestCommon(ShellBase):
     def test_help_unknown_command(self):
         self.assertRaises(exc.CommandError, self.shell, 'help foofoo')
 
-    def test_debug(self):
-        httplib2.debuglevel = 0
-        self.shell('--debug help')
-        self.assertEqual(httplib2.debuglevel, 1)
-
     def test_help(self):
         required = [
             '^usage: heat',

requirements.txt

@@ -1,6 +1,5 @@
 pbr>=0.5.21,<1.0
 argparse
-httplib2
 iso8601>=0.1.8
 PrettyTable>=0.7,<0.8
 python-keystoneclient>=0.4.1