garbage-collect now-broken patch, it was replaced with a command in Makefile

geo/mapproxy/patches/patch-setup_py

@@ -1,13 +0,0 @@
-$OpenBSD: patch-setup_py,v 1.3 2015/10/31 08:20:42 landry Exp $
-fix for actual released version
---- setup.py.orig	Tue Sep 22 14:55:07 2015
-+++ setup.py	Sat Oct 31 08:55:03 2015
-@@ -54,7 +54,7 @@ def long_description(changelog_releases=10):
- 
- setup(
-     name='MapProxy',
--    version="1.8.1a0",
-+    version="1.8.1",
-     description='An accelerating proxy for web map services',
-     long_description=long_description(7),
-     author='Oliver Tonnhofer',