$NetBSD: patch-src_3rdparty_opennurbs_CMakeLists.txt,v 1.1 2025/03/16 14:56:12 plunky Exp $

don't provide zlib, use pkgsrc version

--- src/3rdparty/opennurbs/CMakeLists.txt.orig	2025-03-09 09:31:31.081861147 +0000
+++ src/3rdparty/opennurbs/CMakeLists.txt
@@ -1,5 +1,4 @@
 cmake_minimum_required(VERSION 3.16)
 project(opennurbs VERSION 1.0 LANGUAGES CXX C)
 
-add_subdirectory(zlib)
 add_subdirectory(opennurbs)
