Do not encode cookie values
Do not encode cookie values

Cookie values as bytes is from ancient Python 2 days, and is no longer necessary since Python 3.

In Python 3, cookie values are coerced to `str` before they are encoded, which previously emitted BytesWarning:
https://github.com/python/cpython/blob/3.6/Lib/http/cookies.py#L636

Seen in tests:
corehq.apps.app_manager.tests.test_views:TestViews.test_advanced_module

dimagi/commcare-hq,dimagi/commcare-hq,dimagi/commcare-hq,dimagi/commcare-hq,dimagi/commcare-hq