Removed a nonexistent link in the docs.

Model attributes

================

:attr:`~objects`

``objects``

    The most important attribute of a model is the

    :class:`~django.db.models.Manager`, which is the interface through which 

    :class:`~django.db.models.Manager`. It's the interface through which

    database query operations are provided to Django models and is used to

    :ref:`retrieve the instances <retrieving-objects>` from the database. If no

    custom Manager is defined, the default name is ``objects``. Managers are 

    only accessible via model classes, not the model instances. 

    custom ``Manager`` is defined, the default name is ``objects``. Managers

    are only accessible via model classes, not the model instances.

.. _model-methods: