8564 developer/build/onbld shouldn't require ghostscript
Reviewed by: Alexander Pyhalov <apyhalov@gmail.com>

@@ -18,10 +18,13 @@
 #
 # CDDL HEADER END
 #
 #
 # Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
+#
+# Copyright 2019 Joyent, Inc.
+#
 
 
 This directory contains the tools used to do a full build of the
 OS/Net workspace.  They usually live in the /opt/onbld directory on build
 machines. From here, 'make install' will build and install the tools

@@ -80,14 +83,10 @@
         the -o option to simplify the output for diffing with previous
         build results.  It also uses the -i option to obtain NEEDED and RUNPATH
         entries, which help detect changes in software dependencies and makes
         sure objects don't have any strange runpaths like /opt/SUNWspro/lib.
 
-codereview
-        Given two filenames, creates a postscript file with the file 
-        differences highlighted.
-
 codesign
         Tools for signing cryptographic modules using the official
         Sun release keys stored on a remote signing server. This
         directory contains signit, a client program for signing
         files with the signing server; signproto, a shell script