diff --git a/pep-0553.rst b/pep-0553.rst
index 8da7c433c0b..dea7150922e 100644
--- a/pep-0553.rst
+++ b/pep-0553.rst
@@ -280,22 +280,8 @@ References
 .. [impl]
    https://github.com/python/cpython/pull/3355
 
-.. [envar]
-   https://mail.python.org/pipermail/python-dev/2017-September/149447.html
-
 
 Copyright
 =========
 
 This document has been placed in the public domain.
-
-
-
-..
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-   mode: indented-text
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-   sentence-end-double-space: t
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