bpo-45845: Remove unresponsive web link (GH-29651) (GH-29674)

Threading notes by Aahz from OSCON 2001.

(cherry picked from commit 985233914504c73f14a23af1c68a3709079e6913)
Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
diff --git a/Doc/faq/library.rst b/Doc/faq/library.rst
index 45c20bd..ebc6eae 100644
--- a/Doc/faq/library.rst
+++ b/Doc/faq/library.rst
@@ -243,9 +243,6 @@
 The :mod:`threading` module builds convenient abstractions on top of the
 low-level primitives provided by the :mod:`_thread` module.
 
-Aahz has a set of slides from his threading tutorial that are helpful; see
-http://www.pythoncraft.com/OSCON2001/.
-
 
 None of my threads seem to run: why?
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