[CI] Cannot CI couchdb as pycouchdb package is broken:

  Using cached requests-2.7.0-py2.py3-none-any.whl
Collecting pycouchdb (from -r /opt/devel/celery/requirements/extras/couchdb.txt (line 2))
  Using cached pycouchdb-1.13.tar.gz
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 20, in <module>
      File "/private/var/folders/t_/8b21_y5j4mdc1r8cslkyr9580000gn/T/pip-build-eSLwrL/pycouchdb/setup.py", line 10, in <module>
        import pycouchdb
      File "pycouchdb/__init__.py", line 10, in <module>
        from .client import Server
      File "pycouchdb/client.py", line 13, in <module>
        from .resource import Resource
      File "pycouchdb/resource.py", line 5, in <module>
        import requests
    ImportError: No module named requests

requirements/test-ci.txt

@@ -3,7 +3,6 @@ coveralls
 -r extras/redis.txt
 -r extras/cassandra.txt
 -r extras/couchbase.txt
--r extras/couchdb.txt
 -r extras/mongodb.txt
 -r extras/riak.txt
 -r extras/sqlalchemy.txt