Cleanup the README

There's duplicate information in the README regarding where to contribute,
where to open bugs, where the documentation lies. This change deletes the
dups and also puts the references at the end which is standard for most
documents.

README.rst

@@ -46,32 +46,6 @@ it generates a report.
 Bandit was originally developed within the OpenStack Security Project and
 later rehomed to PyCQA.
 
-References
-----------
-
-Bandit docs: https://bandit.readthedocs.io/en/latest/
-
-Python AST module documentation: https://docs.python.org/3/library/ast.html
-
-Green Tree Snakes - the missing Python AST docs:
-https://greentreesnakes.readthedocs.org/en/latest/
-
-Documentation of the various types of AST nodes that Bandit currently covers
-or could be extended to cover:
-https://greentreesnakes.readthedocs.org/en/latest/nodes.html
-
-Contributing
-------------
-
-Follow our Contributing file:
-https://github.com/PyCQA/bandit/blob/main/CONTRIBUTING.md
-
-Reporting Bugs
---------------
-
-Bugs should be reported on github. To file a bug against Bandit, visit:
-https://github.com/PyCQA/bandit/issues
-
 Show Your Style
 ---------------
 
@@ -90,3 +64,15 @@ using RST::
     .. image:: https://img.shields.io/badge/security-bandit-yellow.svg
         :target: https://github.com/PyCQA/bandit
         :alt: Security Status
+
+References
+----------
+
+Python AST module documentation: https://docs.python.org/3/library/ast.html
+
+Green Tree Snakes - the missing Python AST docs:
+https://greentreesnakes.readthedocs.org/en/latest/
+
+Documentation of the various types of AST nodes that Bandit currently covers
+or could be extended to cover:
+https://greentreesnakes.readthedocs.org/en/latest/nodes.html