Removed django.views.defaults.shortcut and django.conf.urls.shortcut per deprecation timeline.
Removed Model._meta.get_(add|change|delete)_permission methods per deprecation timeline.
Removed fix_ampersands template filter per deprecation timeline.

Also removed related utility functions:
* django.utils.html.fix_ampersands
* django.utils.html.clean_html
Removed settings.CACHE_MIDDLEWARE_ANONYMOUS_ONLY per deprecation timeline.

refs #15201.
Removed reading of old 'django_language' session variable per deprecation timeline.

refs #5789.
Removed PIL compatability layer per deprecation timeline.

refs #19934.
Removed Model._meta.module_name per deprecation timeline.

refs #19689.
Removed django.forms.widgets.RadioInput per deprecation timeline.

refs #4592.
Removed warning for settings.ADMIN_FOR which has been removed.

refs #21386.
Removed reading of legacy admin popup GET parameter.

refs #20288.
Switched {% cycle %} and {% firstof %} tags to auto-escape their variables per deprecation timeline.

refs #17906.
Fixed broken link in 1.7 release notes due to removal of deprecated code/docs.
Removed django.test.simple and django.test._doctest per deprecation timeline.

refs #17365, #17366, #18727.
Fixed typos in docs (django.contrib.site)
Removed legacy transaction management per the deprecation timeline.
Fixed transaction handling in two management commands.

Previously, when createcachetable and flush operated on non-default
databases, they weren't atomic.
Removed deprecated TRANSACTIONS_MANAGED setting.
Removed useless warning silencing.

If memory serves, the corresponding warning disappeared in Django 1.7.
The cycle and firstof tags no longer raise warnings.

Refs #17906.
Removed django.middleware.doc. Refs #20126.

Small doc changes missed in 66076268.