temp/readline: remove (use upstream again)

Readline has been upgraded in upstream, the original reason why it was
forked is not necessary anymore. See:
https://gitlab.com/postmarketOS/pmaports/issues/217#note_153463712

temp/readline/APKBUILD

-# Maintainer: Natanael Copa <ncopa@alpinelinux.org>
-pkgname=readline
-pkgver=7.0.003
-pkgrel=1
-_myver=${pkgver%.*}
-pkgdesc="GNU readline library"
-url="https://cnswww.cns.cwru.edu/php/chet/readline/rltop.html"
-arch="all"
-options="!check"
-license="GPL"
-depends=
-makedepends_host="ncurses-dev"
-subpackages="$pkgname-dev $pkgname-doc libhistory"
-source="http://ftp.gnu.org/gnu/$pkgname/$pkgname-$_myver.tar.gz
-	fix-ncurses-underlinking.patch
-	"
-
-for _patch in $(seq -w 001 ${pkgver##*.}); do
-	_name=$pkgname${_myver//./}-$_patch
-	source="$source $_name.diff::http://ftp.gnu.org/gnu/$pkgname/$pkgname-$_myver-patches/$_name"
-done
-
-builddir="$srcdir/$pkgname-$_myver"
-
-prepare() {
-	local i
-	cd "$builddir"
-	for i in $source; do
-		case ${i%::*} in
-		*.diff) msg ${i#*::}; patch -p0 -i "$srcdir"/${i%::*} || return 1;;
-		esac
-	done
-	default_prepare || return 1
-	update_config_sub
-}
-
-build() {
-	cd "$builddir"
-	./configure \
-		--build=$CBUILD \
-		--host=$CHOST \
-		--prefix=/usr \
-		--mandir=/usr/share/man \
-		--infodir=/usr/share/info \
-		--enable-static \
-		--enable-shared \
-		|| return 1
-	make || return 1
-}
-
-package() {
-	make -C "$builddir" DESTDIR="$pkgdir" install || return 1
-	# verfy that its not underlinked as upstream designed it
-	if ! readelf -d "$pkgdir"/usr/lib/libreadline.so | grep 'NEEDED.*ncurses'; then
-		error "readline needs to be linked against ncurses"
-		return 1
-	fi
-	rmdir "$pkgdir"/usr/bin
-}
-
-libhistory() {
-	pkgdesc="GNU History Library"
-	mkdir -p "$subpkgdir"/usr/lib || return 1
-	mv "$pkgdir"/usr/lib/$subpkgname.* "$subpkgdir"/usr/lib || return 1
-}
-
-sha512sums="18243189d39bf0d4c8a76cddcce75243c1bae8824c686e9b6ba352667607e5b10c5feb79372a1093c1c388d821841670702e940df12eae94bcebdeed90047870  readline-7.0.tar.gz
-325dcf74e9f463a74fb116cb6f3ff8d9708dbec24b423a778eeda3a5ac4fe6df131e0e99d034053ad356b01502894ecc8facc09160d4c29b2291bd95cff6b635  fix-ncurses-underlinking.patch
-4402186905af8cd42c609d640c2e13b9ad61c7778e5a3fd2c2d9da301f0deab05b04d7836f31527262f44f406517823dbb18cb07f2c73931186c806b494699ec  readline70-001.diff
-13d1489578508d4d2c3a1618024198a709dbce74a6bbf0f6d7ec67d2419c55bfec9f0ca9de0ed93f129d21d5c3a94307ccdc49408455bbb301c5e3a772b03185  readline70-002.diff
-eaf962a1480eb3870519017b81ecc5cef171e4c41fcf8c17da61ccbfd0379ed6bca85c17b03e2207ae4d51509f33fd010294c75f4bd0433a52118015d4160385  readline70-003.diff"

temp/readline/fix-ncurses-underlinking.patch

---- ./shlib/Makefile.in.orig
-+++ ./shlib/Makefile.in
-@@ -86,7 +86,7 @@
- SHOBJ_LIBS = @SHOBJ_LIBS@
- 
- SHLIB_XLDFLAGS = @LDFLAGS@ @SHLIB_XLDFLAGS@
--SHLIB_LIBS = @SHLIB_LIBS@
-+SHLIB_LIBS = @SHLIB_LIBS@ -lncursesw
- 
- SHLIB_DOT = @SHLIB_DOT@
- SHLIB_LIBPREF = @SHLIB_LIBPREF@