PEP 352: Fix Sphinx reference warning (#4147)

Co-authored-by: Guido van Rossum <[email protected]>

Author: hugovk

peps/pep-0352.rst

@@ -1,11 +1,8 @@
 PEP: 352
 Title: Required Superclass for Exceptions
-Version: $Revision$
-Last-Modified: $Date$
 Author: Brett Cannon, Guido van Rossum
 Status: Final
 Type: Standards Track
-Content-Type: text/x-rst
 Created: 27-Oct-2005
 Python-Version: 2.5
 Post-History:
@@ -276,24 +273,13 @@ References
 .. [#hierarchy-good] python-dev Summary for 2004-08-01 through 2004-08-15
    http://www.python.org/dev/summary/2004-08-01_2004-08-15.html#an-exception-is-an-exception-unless-it-doesn-t-inherit-from-exception
 
-.. [#SF_1104669] SF patch #1104669 (new-style exceptions)
-   https://bugs.python.org/issue1104669
-
 .. [#pycon2007-sprint-email]  python-3000 email ("How far to go with cleaning up exceptions")
     https://mail.python.org/pipermail/python-3000/2007-March/005911.html
 
+* Issue for new-style exceptions:
+  `python/cpython#41459 <https://github.com/python/cpython/issues/41459>`__
 
 Copyright
 =========
 
 This document has been placed in the public domain.
-
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