net/miniupnpc: drop obsolte patch

net/miniupnpc/files/patch-setup.py

@@ -1,10 +0,0 @@
---- setup.py.orig	2017-11-02 17:38:01 UTC
-+++ setup.py
-@@ -30,6 +30,6 @@ setup(name="miniupnpc",
-       cmdclass={'build_ext': make_then_build_ext},
-       ext_modules=[
-          Extension(name="miniupnpc", sources=["miniupnpcmodule.c"],
--                   extra_objects=EXT)
-+                   libraries=["miniupnpc"])
-       ])
-