Fixed #18647 - Removed link to Malcolm's blog which is gone.

docs/internals/committers.txt

@@ -77,7 +77,7 @@ record of being helpful on the mailing lists, and a proven desire to dedicate
 serious time to Django. In return, they've been granted the coveted commit bit,
 and have free rein to hack on all parts of Django.
 
-`Malcolm Tredinnick`_
+Malcolm Tredinnick
     Malcolm originally wanted to be a mathematician, somehow ended up a software
     developer. He's contributed to many Open Source projects, has served on the
     board of the GNOME foundation, and will kick your ass at chess.
@@ -85,8 +85,6 @@ and have free rein to hack on all parts of Django.
     When he's not busy being an International Man of Mystery, Malcolm lives in
     Sydney, Australia.
 
-.. _malcolm tredinnick: http://www.pointy-stick.com/
-
 `Russell Keith-Magee`_
     Russell studied physics as an undergraduate, and studied neural networks for
     his PhD. His first job was with a startup in the defense industry developing