mpack: drop package

The package is ancient, old and not developed anymore.
Project URL on GitLab shows 404, I could find it on Debian GitLab [1].

[1] https://salsa.debian.org/debian/mpack

Signed-off-by: Josef Schlehofer <pepe.schlehofer@gmail.com>

utils/mpack/Makefile

@@ -1,45 +0,0 @@
-#
-# Copyright (C) 2007-2014 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
-
-include $(TOPDIR)/rules.mk
-
-PKG_NAME:=mpack
-PKG_VERSION:=1.6
-PKG_RELEASE:=1
-PKG_LICENSE:=NLPL
-
-PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
-PKG_SOURCE_URL:=https://fossies.org/linux/misc/old
-PKG_HASH:=274108bb3a39982a4efc14fb3a65298e66c8e71367c3dabf49338162d207a94c
-
-PKG_INSTALL:=1
-
-include $(INCLUDE_DIR)/package.mk
-
-define Package/mpack
-  SECTION:=utils
-  CATEGORY:=Utilities
-  TITLE:=mpack/munpack MIME format mail messages
-  URL:=https://gitlab.com/osdp/mpack
-  MAINTAINER:=Dmitry V. Zimin <pfzim@mail.ru>
-endef
-
-define Package/mpack/description
-  Mpack and munpack are utilities for encoding and decoding
-  (respectively) binary files in MIME (Multipurpose Internet Mail
-  Extensions) format mail messages.  For compatibility with older forms
-  of transferring binary files, the munpack program can also decode
-  messages in split-uuencoded format.
-endef
-
-define Package/mpack/install
-	$(INSTALL_DIR) $(1)/usr/bin
-	$(INSTALL_BIN) $(PKG_INSTALL_DIR)/usr/bin/* $(1)/usr/bin/
-endef
-
-$(eval $(call BuildPackage,mpack))
-

utils/mpack/patches/001-use-stdlib.patch

@@ -1,30 +0,0 @@
---- a/unixos.c
-+++ b/unixos.c
-@@ -25,6 +25,7 @@
- #include <stdio.h>
- #include <ctype.h>
- #include <string.h>
-+#include <stdlib.h>
- #include <errno.h>
- #include <sys/types.h>
- #include <sys/param.h>
-@@ -39,8 +40,6 @@
- #endif
- 
- extern int errno;
--extern char *malloc();
--extern char *getenv();
- 
- int overwrite_files = 0;
- int didchat;
---- a/xmalloc.c
-+++ b/xmalloc.c
-@@ -24,7 +24,7 @@
-  */
- #include <stdio.h>
- #include <string.h>
--extern char *malloc(), *realloc();
-+#include <stdlib.h>
- 
- char *xmalloc (int size)
- {