Removed unneeded smart_str in cache utils.

from django.conf import settings

from django.core.cache import get_cache

from django.utils.encoding import smart_str, iri_to_uri, force_unicode

from django.utils.encoding import iri_to_uri, force_unicode

from django.utils.http import http_date

from django.utils.timezone import get_current_timezone_name

from django.utils.translation import get_language

        if t[1] is True:

            return t[0]

        else:

            return t[0] + '=' + smart_str(t[1])

            return '%s=%s' % (t[0], t[1])

    if response.has_header('Cache-Control'):

        cc = cc_delim_re.split(response['Cache-Control'])