Removed a no-op statement in tests/multiple_database/tests.py.

class RouteForWriteTestCase(TestCase):

    multi_db = True

    RAISE_MSG = 'Db for write called'

    class WriteCheckRouter(object):

        def db_for_write(self, model, **hints):

        book = Book.objects.create(title="Pro Django",

                                   published=datetime.date(2008, 12, 16))

        book.authors.add(auth)

        self.assertRaisesMessage(AttributeError, self.RAISE_MSG, )

        try:

            with self.override_router():

                book.authors.remove(auth)