Remove httplib2

It's used only for setup debug level info, but since HTTPClient
switched to requests lib, it became useless.

requests lib does no logging of its own. It's logging actually
done by urllib3 and can be setup as usual logging level.

Change-Id: I7df95e41d5f3a2406b43643bfa828b751faab116

ironicclient/shell.py

@@ -21,7 +21,6 @@ import getpass
 import logging
 import sys
 
-import httplib2
 from keystoneauth1.loading import session as kasession
 from oslo_utils import encodeutils
 import six
@@ -254,8 +253,6 @@ class IronicShell(object):
             logging.basicConfig(
                 format="%(levelname)s (%(module)s:%(lineno)d) %(message)s",
                 level=logging.DEBUG)
-
-            httplib2.debuglevel = 1
         else:
             logging.basicConfig(
                 format="%(levelname)s %(message)s",

ironicclient/tests/unit/test_shell.py

@@ -15,7 +15,6 @@ import sys
 import uuid
 
 import fixtures
-import httplib2
 from keystoneauth1 import exceptions as keystone_exc
 from keystoneauth1 import fixture as ks_fixture
 import mock
@@ -91,11 +90,6 @@ class ShellTest(utils.BaseTestCase):
     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(1, httplib2.debuglevel)
-
     def test_help(self):
         required = [
             '.*?^usage: ironic',

requirements.txt

@@ -5,7 +5,6 @@ pbr>=1.6 # Apache-2.0
 appdirs>=1.3.0 # MIT License
 dogpile.cache>=0.5.7 # BSD
 cliff!=1.16.0,!=1.17.0,>=1.15.0 # Apache-2.0
-httplib2>=0.7.5 # MIT
 keystoneauth1>=2.1.0 # Apache-2.0
 oslo.i18n>=2.1.0 # Apache-2.0
 oslo.utils>=3.5.0 # Apache-2.0