Remove obsolete docs on pep8 sanity test.

docs/docsite/rst/dev_guide/testing_pep8.rst

@@ -10,50 +10,15 @@ PEP 8
 
 `PEP 8`_ style guidelines are enforced by `pycodestyle`_ on all python files in the repository by default.
 
-Current Rule Set
-================
-
-By default all files are tested using the current rule set.
-All `PEP 8`_ tests are executed, except those listed in the `current ignore list`_.
-
-.. warning: Updating the Rule Set
-
-   Changes to the Rule Set need approval from the Core Team, and must be done via the `Testing Working Group <https://github.com/ansible/community/blob/master/meetings/README.md>`_.
-
-Legacy Rule Set
-===============
-
-Files which are listed in the `legacy file list`_ are tested using the legacy rule set.
-
-All `PEP 8`_ tests are executed, except those listed in the `current ignore list`_ or `legacy ignore list`_.
-
-Files listed in the legacy file list which pass the current rule set will result in an error.
-
-This is intended to prevent regressions on style guidelines for files which pass the more stringent current rule set.
-
-Skipping Tests
-==============
-
-Files listed in the `skip list`_ are not tested by `pycodestyle`_.
-
-Removed Files
-=============
-
-Files which have been removed from the repository must be removed from the legacy file list and the skip list.
-
 Running Locally
 ===============
 
 The `PEP 8`_ check can be run locally with::
 
 
-    ./test/runner/ansible-test sanity --test pep8 [file-or-directory-path-to-check] ...
+    ansible-test sanity --test pep8 [file-or-directory-path-to-check] ...
 
 
 
 .. _PEP 8: https://www.python.org/dev/peps/pep-0008/
 .. _pycodestyle: https://pypi.org/project/pycodestyle/
-.. _current ignore list: https://github.com/ansible/ansible/blob/devel/test/sanity/pep8/current-ignore.txt
-.. _legacy file list: https://github.com/ansible/ansible/blob/devel/test/sanity/pep8/legacy-files.txt
-.. _legacy ignore list: https://github.com/ansible/ansible/blob/devel/test/sanity/pep8/legacy-ignore.txt
-.. _skip list: https://github.com/ansible/ansible/blob/devel/test/sanity/pep8/skip.txt