Remove mentions of cliquet

Author: Rémy HUBSCHER

README.rst

@@ -257,7 +257,7 @@ To enable this, specify the number of retries on the client:
                   retry=10)
 
 The Kinto protocol lets the server `define the duration in seconds between retries
-<https://kinto.readthedocs.io/en/latest/api/1.x/cliquet/backoff.html#retry-after-indicators>`_.
+<https://kinto.readthedocs.io/en/latest/api/1.x/backoff.html>`_.
 It is possible (but not recommended) to force this value in the clients:
 
 .. code-block:: python

kinto_http/tests/functional.py

@@ -5,7 +5,7 @@
 import requests
 from six.moves import configparser
 
-from cliquet import utils as cliquet_utils
+from kinto.core import utils as kinto_core_utils
 
 from kinto_http import Client, BucketNotFound, KintoException
 from kinto_http import replication
@@ -38,7 +38,7 @@ def tearDown(self):
     def get_user_id(self, credentials):
         hmac_secret = self.config.get('app:main', 'kinto.userid_hmac_secret')
         credentials = '%s:%s' % credentials
-        digest = cliquet_utils.hmac_digest(hmac_secret, credentials)
+        digest = kinto_core_utils.hmac_digest(hmac_secret, credentials)
         return 'basicauth:%s' % digest
 
     def test_bucket_creation(self):

kinto_http/tests/test_client.py

@@ -3,7 +3,7 @@
 from .support import unittest, mock_response, build_response, get_http_error
 
 from kinto_http import (KintoException, BucketNotFound, Client,
-                          DO_NOT_OVERWRITE)
+                        DO_NOT_OVERWRITE)
 
 
 class ClientTest(unittest.TestCase):