Delete broken link to Network Theory Ltd.

Sadly, their website has been down for several months already.
I was unable to find a new link, but it seems like they haven't
published anything new for over a decade.
* doc/misc/org.org (Summary): Remove broken link to Network Theory Ltd.

diff --git a/doc/misc/org.org b/doc/misc/org.org
index 1ce99728c60f2df605eec5cb898151d7e61f6c0e..e3ef95534805431121fd16dd4316f0639021ad24 100644 (file)
--- a/doc/misc/org.org
+++ b/doc/misc/org.org
@@ -68,8 +68,8 @@ of Org, as well as additional information, frequently asked questions
 [[https://orgmode.org]].
 
 #+cindex: print edition
-An earlier version (7.3) of this manual is available as a [[http://www.network-theory.co.uk/org/manual/][paperback
-book from Network Theory Ltd.]].
+An earlier version (7.3) of this manual was published as a paperback book by
+Network Theory Ltd. in 2010.
 
 ** Installation
 :PROPERTIES: