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>
1 file changed