main/libunistring: removed

the code is ugly/messy and kamailio dont need it anymore.

main/libunistring/APKBUILD

-# Contributor:
-# Maintainer: Nathan Angelacos <nangel@alpinelinux.org>
-pkgname=libunistring
-pkgver=0.9.3
-pkgrel=0
-pkgdesc="GNU Unicode string library"
-url="http://www.gnu.org/software/libunistring/"
-arch="all"
-license="LGPLv3+"
-depends=""
-depends_dev="libiconv-dev"
-makedepends="$depends_dev"
-install=""
-subpackages="$pkgname-dev $pkgname-doc"
-source="http://ftp.gnu.org/gnu/libunistring/$pkgname-$pkgver.tar.gz"
-
-_builddir="$srcdir/$pkgname-$pkgver"
-
-prepare() {
-	local i
-	cd "$_builddir"
-	update_config_sub || return 1
-	for i in $source; do
-		case $i in
-		*.patch) msg $i; patch -p1 -i "$srcdir"/$i || return 1;;
-		esac
-	done
-}
-
-build() {
-	cd "$_builddir"
-	 ./configure \
-		--build=$CBUILD \
-		--host=$CHOST \
-		--prefix=/usr \
-		|| return 1
-	make all || return 1
-}
-
-package() {
-	cd "$_builddir"
-    make DESTDIR="$pkgdir" install || return 1
-    rm "$pkgdir"/usr/lib/*.la
-}
-
-md5sums="db8eca3b64163abadf8c40e5cecc261f  libunistring-0.9.3.tar.gz"
-sha256sums="610d3ec724fbdaa654afe3cff20b9f4d504be3fd296fded2e0f7f764041006a3  libunistring-0.9.3.tar.gz"
-sha512sums="351c0c94c4a31efbed932978ff8afae4defd7c28771d2d877b5ead5383a4f1b53200ece72b6908a9bafb7836775b2af3465e051226e43520ada2b8c583314d12  libunistring-0.9.3.tar.gz"