removed unused import from tutorial 3 documentation as per ticket #18915

  further processing.

Now that we've decoupled that, we need to decouple the ``polls.urls``

URLconf by removing the leading "polls/" from each line, and removing the

lines registering the admin site. Your ``polls/urls.py`` file should now look like

URLconf by removing the leading "polls/" from each line, removing the

lines registering the admin site, and removing the ``include`` import which

is no longer used. Your ``polls/urls.py`` file should now look like

this::

    from django.conf.urls import patterns, include, url

    from django.conf.urls import patterns, url

    urlpatterns = patterns('polls.views',

        url(r'^$', 'index'),