Reverted "Fixed #25203 -- Documented how to pass Apache environment variables to Django."

As discussed on the ticket, this isn't a pattern we should recommend.

This reverts commit 47016d4322574860f90431e1c87d19f7a1f778c6.

docs/howto/deployment/wsgi/modwsgi.txt

@@ -125,47 +125,6 @@ mode`_.
 
 .. _details on setting up daemon mode: http://code.google.com/p/modwsgi/wiki/QuickConfigurationGuide#Delegation_To_Daemon_Process
 
-Apache environment variables
-============================
-
-If you want to specify a different Django settings file or additional variables
-for your Django application via the Apache configuration, you would do it like
-this:
-
-.. code-block:: apache
-
-    SetEnv DB_USER dbusername
-    SetEnv DJANGO_SETTINGS_MODULE mysite.alternate-settings
-
-The ``SetEnv`` directive creates Apache environment variables instead of OS
-environment variables, so you will need to replace the default ``wsgi.py`` file
-with::
-
-    import os
-
-    from django.core.wsgi import get_wsgi_application
-
-    # A tuple of Apache environment variables to pass through to Django.
-    env_variables_to_pass = ('DB_USER', )
-
-    def application(environ, start_response):
-        """
-        Wrapper for the WSGI application that passes environment variables.
-        """
-        os.environ['DJANGO_SETTINGS_MODULE'] = environ.get('DJANGO_SETTINGS_MODULE', 'mysite.settings')
-        for var in env_variables_to_pass:
-            os.environ[var] = environ.get(var, '')
-        return get_wsgi_application()(environ, start_response)
-
-Now you can specify a new settings file in Apache using the
-``SetEnv DJANGO_SETTINGS_MODULE ...`` line, and if that setting isn't
-specified, it uses ``'mysite.settings'`` as a default. You'll want to change
-``mysite.settings`` to reference your own ``settings.py`` module.
-
-Additionally, you can use the ``env_variables_to_pass`` tuple to specify any
-other Apache environment variables, such as database login credentials, that
-should be passed along to the Django application as OS environment variables.
-
 .. _serving-files:
 
 Serving files