libandroid-support: finally drop iconv implementation

It is replaced by GNU iconv.

packages/libandroid-support/build.sh

@@ -1,10 +1,9 @@
 TERMUX_PKG_HOMEPAGE=https://github.com/termux/libandroid-support
 TERMUX_PKG_DESCRIPTION="Library extending the Android C library (Bionic) for additional multibyte, locale and math support"
 TERMUX_PKG_LICENSE="Apache-2.0"
-TERMUX_PKG_VERSION=24
-TERMUX_PKG_REVISION=7
+TERMUX_PKG_VERSION=25
 TERMUX_PKG_SRCURL=https://github.com/termux/libandroid-support/archive/v$TERMUX_PKG_VERSION.tar.gz
-TERMUX_PKG_SHA256=e14e262429a60bea733d5bed69d2f3a1cada53fcadaf76787fca5c8b0d4dae2f
+TERMUX_PKG_SHA256=42e7b55c2e5fc91cc0447fa8bea432e7a75ec78b03469330668af17aea56f660
 TERMUX_PKG_PRE_DEPENDS="dpkg (>= 1.19.4-3)"
 TERMUX_PKG_BUILD_IN_SRC=yes
 TERMUX_PKG_ESSENTIAL=yes

packages/libandroid-support/iconv-decls.patch

@@ -1,20 +0,0 @@
-diff -uNr libandroid-support-24/src/musl-locale/iconv.c libandroid-support-24.mod/src/musl-locale/iconv.c
---- libandroid-support-24/src/musl-locale/iconv.c	2019-01-25 03:17:10.000000000 +0200
-+++ libandroid-support-24.mod/src/musl-locale/iconv.c	2019-05-23 02:25:07.770702362 +0300
-@@ -1,4 +1,3 @@
--#include <iconv.h>
- #include <errno.h>
- #include <wchar.h>
- #include <string.h>
-@@ -6,6 +5,11 @@
- #include <limits.h>
- #include <stdint.h>
- 
-+typedef void* iconv_t;
-+iconv_t iconv_open(const char*, const char*);
-+size_t  iconv(iconv_t, char**, size_t*, char**, size_t*);
-+int     iconv_close(iconv_t);
-+
- #define UTF_32BE    0300
- #define UTF_16LE    0301
- #define UTF_16BE    0302