remove mention of jinja2 support while we working on improving it

docs/usage.rst

@@ -65,42 +65,3 @@ Pipeline provide a way to add your javascripts and stylesheets files to a
 cache-manifest via `Manifesto <http://manifesto.readthedocs.org/>`_.
 
 To do so, you just need to add manifesto app to your ``INSTALLED_APPS``.
-
-Jinja2
-======
-
-Pipeline also includes Jinja2 support and is used almost identically to the Django
-Template tags implementation.
-
-.. note::
-  You have to expose the Jinja2 functions provided by pipeline to the Jinja2
-  environment yourself, Pipeline will not do this for you. There are several implementations
-  of Jinja2 for Django, like ``django-ninja`` or ``coffin``.
-
-See the vendor documentation for examples on how to expose functions to the Jinja2 environment
-and pick a solution that best suites your use case.
-
-For more information on Jinja2 see the documentation at http://jinja.pocoo.org/docs/.
-
-Functions
----------
-
-The functions to expose to the Jinja2 environment are: ::
-
-    pipeline.jinja2.ext.compressed_css
-    pipeline.jinja2.ext.compressed_js
-
-Example
--------
-
-To use in the templates: ::
-
-    {{ compressed_css('group_name') }}
-    {{ compressed_js('group_name') }}
-
-
-Templates
----------
-
-Unlike the Django template tag implementation the Jinja2 implementation uses different templates, so if you
-wish to override them please override ``pipeline/css.jinja`` and ``pipeline/js.jinja``.