Remove CONF reference in test_rest_client

rest_client module doesn't depends on CONF values now, so the
corresponding test also doesn't need to use CONF values.

Change-Id: Ia5fea0c875fa90bd05a57a72da8f0236c2a2b993
diff --git a/tempest/tests/test_rest_client.py b/tempest/tests/test_rest_client.py
index e42fab7..aed09a2 100644
--- a/tempest/tests/test_rest_client.py
+++ b/tempest/tests/test_rest_client.py
@@ -18,11 +18,9 @@
 from oslotest import mockpatch
 
 from tempest.common import rest_client
-from tempest import config
 from tempest import exceptions
 from tempest.tests import base
 from tempest.tests import fake_auth_provider
-from tempest.tests import fake_config
 from tempest.tests import fake_http
 
 
@@ -32,8 +30,6 @@
 
     def setUp(self):
         super(BaseRestClientTestClass, self).setUp()
-        self.useFixture(fake_config.ConfigFixture())
-        self.stubs.Set(config, 'TempestConfigPrivate', fake_config.FakePrivate)
         self.rest_client = rest_client.RestClient(
             fake_auth_provider.FakeAuthProvider(), None, None)
         self.stubs.Set(httplib2.Http, 'request', self.fake_http.request)
@@ -296,8 +292,6 @@
 
     def setUp(self):
         super(TestRestClientErrorCheckerJSON, self).setUp()
-        self.useFixture(fake_config.ConfigFixture())
-        self.stubs.Set(config, 'TempestConfigPrivate', fake_config.FakePrivate)
         self.rest_client = rest_client.RestClient(
             fake_auth_provider.FakeAuthProvider(), None, None)