Why does ghostscript-fonts package contains non-free font files ?

Issue

• The following files provided by ghostscript-fonts-5.50-23.1.el6 contain a non-free license:

  /usr/share/fonts/default/ghostscript/bchb.afm
  /usr/share/fonts/default/ghostscript/bchb.pfa
  /usr/share/fonts/default/ghostscript/bchbi.afm
  /usr/share/fonts/default/ghostscript/bchbi.pfa
  /usr/share/fonts/default/ghostscript/bchr.afm
  /usr/share/fonts/default/ghostscript/bchr.pfa
  /usr/share/fonts/default/ghostscript/bchri.afm
  /usr/share/fonts/default/ghostscript/bchri.pfa

• The license of these fonts is:

% Copyright 1990 as an unpublished work by Bitstream Inc., Cambridge, MA.
% All rights reserved.
% Confidential and proprietary to Bitstream Inc.
% U.S. GOVERNMENT RESTRICTED RIGHTS
% This software typeface product is provided with RESTRICTED RIGHTS. Use,
% duplication or disclosure by the Government is subject to restrictions
% as set forth in the license agreement and in FAR 52.227-19 (c) (2) (May, 1987),
% when applicable, or the applicable provisions of the DOD FAR supplement
% 252.227-7013 subdivision (a) (15) (April, 1988) or subdivision (a) (17)
% (April, 1988).  Contractor/manufacturer is Bitstream Inc.,
% 215 First Street, Cambridge, MA 02142.
% Bitstream is a registered trademark of Bitstream Inc.

• Is there any special license text for the above commercial items ?