--- doc/copyright_summary   2024-04-13 16:55:26.577301602 -0400
+++ doc/copyright_summary   2024-04-13 16:55:26.580634935 -0400
@@ -335,48 +335,3 @@
 yuvsplittoppm: (A) 1993      Marcel Wijkstra <wijkstra@fwi.uva.nl>
 yuvtoppm:      (A) 1987-1991 Jef Poskanzer, Abekas Video Systems Inc., DHD PostImage Inc.
 zeisstopnm:    (A) 1993      Oliver Trepte <oliver@fysik4.kth.se>
-
-==============================================================================
-NON-FREE:
-
-The following programs have restrictions on their use or source:
-
-hpcdtoppm package:
-==================
-hpcdtoppm pcdindex
-
-*  Copyright (c) 1992, 1993, 1994 by Hadmut Danisch (danisch@ira.uka.de).
-*  Permission to use and distribute this software and its
-*  documentation for noncommercial use and without fee is hereby granted,
-*  provided that the above copyright notice appear in all copies and that
-*  both that copyright notice and this permission notice appear in
-*  supporting documentation. It is not allowed to sell this software in 
-*  any way. This software is not public domain.
-
-Note that Hpcdtoppm and Pcdindex are not distributed in the main Netpbm
-package on Sourceforge, as Sourceforge does not offer distribution services
-for software licensed in this way.  These programs are distributed in the
-supplemental Netpbm package on Ibiblio.
-
-filter to create GIFs - patent restricted. (http://www.unisys.com/unisys/lzw/)
-ppmtogif:      (A) 1989      Jef Poskanzer
-
-The Unisys patent, at least in the US, expired in 2003.
-
-=============================================================================
-UNKNOWN, SO NOT DISTRIBUTED:
-
-The following programs are in the upstream source package, but do not
-have sufficient copyright and license information to be redistributed:
-
-pamchannel:  No copyright / license text found
-pamtopnm:    No copyright / license text found
-pbmto4425:   No copyright / license text found
-pbmtoln03:   No copyright / license text found
-pbmtolps:    No copyright / license text found
-pbmtopk:     No copyright / license text found
-pktopbm:     No copyright / license text found
-ppmtopjxl:   No copyright / license text found
-spottopgm:   No copyright / license text found
-
-
