Previously updated libpng no longer needs special handling.

- 64 bits patch no longer required.
- copying header file no longer required.

graphic/libpng/64-config-header.diff

@@ -1,28 +0,0 @@
-# --- SDE-COPYRIGHT-NOTE-BEGIN ---
-# This copyright note is auto-generated by ./scripts/Create-CopyPatch.
-# 
-# Filename: package/.../libpng/64-config-header.diff
-# Copyright (C) 2007 The OpenSDE Project
-# 
-# More information can be found in the files COPYING and README.
-# 
-# This patch file is dual-licensed. It is available under the license the
-# patched project is licensed under, as long as it is an OpenSource license
-# as defined at http://www.opensource.org/ (e.g. BSD, X11) or under the terms
-# of the GNU General Public License as published by the Free Software
-# Foundation; either version 2 of the License, or (at your option) any later
-# version.
-# --- SDE-COPYRIGHT-NOTE-END ---
-
---- ./pngconf.h.orig	2007-01-05 14:58:52.000000000 +0200
-+++ ./pngconf.h	2007-01-11 16:58:35.513932000 +0200
-@@ -729,6 +729,9 @@
-  * PNG_NO_MMX_CODE disables the use of MMX code without changing the API.
-  * When MMX code is off, then optimized C replacement functions are used.
- */
-+
-+#define PNG_NO_ASSEMBLER_CODE
-+
- #if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_ASSEMBLER_CODE)
- #  ifndef PNG_ASSEMBLER_CODE_SUPPORTED
- #    define PNG_ASSEMBLER_CODE_SUPPORTED

graphic/libpng/libpng.conf

@@ -1,20 +0,0 @@
-# --- SDE-COPYRIGHT-NOTE-BEGIN ---
-# This copyright note is auto-generated by ./scripts/Create-CopyPatch.
-# 
-# Filename: package/.../libpng/libpng.conf
-# Copyright (C) 2006 The OpenSDE Project
-# Copyright (C) 2004 - 2006 The T2 SDE Project
-# Copyright (C) 1998 - 2003 Clifford Wolf
-# 
-# More information can be found in the files COPYING and README.
-# 
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; version 2 of the License. A copy of the
-# GNU General Public License can be found in the file COPYING.
-# --- SDE-COPYRIGHT-NOTE-END ---
-
-[ $arch != x86 ] &&  var_append patchfiles ' ' "$confdir/64-config-header.diff"
-
-hook_add postmake 5 "ln -sf libpng12/png.h $root$includedir/png.h ; \
-          ln -sf libpng12/pngconf.h $root$includedir/pngconf.h"