miniupnpd: remove my maintainership

Practicalities of life have intervened and I am no longer able to
dedicate the time required to look after this package.

Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>

net/miniupnpd/Makefile

@@ -15,7 +15,6 @@ PKG_SOURCE_URL:=http://miniupnp.free.fr/files
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_HASH:=950894779661197fe093855fda29a728f434b5756eb4fa6cb5f7b9bff7ffe0c1
 
-PKG_MAINTAINER:=Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
 PKG_LICENSE:=BSD-3-Clause
 
 include $(INCLUDE_DIR)/package.mk