extra-repos/systemd/alpine-base: remove

Since last commit, we no longer depend on it in postmarketos-base, and
this fork is not necessary

Part-of: https://gitlab.postmarketos.org/postmarketOS/pmaports/-/merge_requests/6475

extra-repos/systemd/alpine-base/APKBUILD

@@ -1,33 +0,0 @@
-# Forked from Alpine to remove openrc dependency
-
-pkgname=alpine-base
-pkgver=9999
-pkgrel=0
-pkgdesc="Meta package for minimal alpine base"
-url="https://alpinelinux.org"
-arch="noarch"
-license="MIT"
-depends="
-	alpine-baselayout
-	alpine-release
-	apk-tools
-	busybox
-	busybox-suid
-	libc-utils
-"
-
-# can't include systemd here, as we wan't to upgrade from alpine's base to our systemd-base while building
-subpackages="alpine-release:release"
-replaces="alpine-baselayout"
-options="pmb:strict !check"
-
-package() {
-	mkdir -p "$pkgdir"
-}
-
-release() {
-	depends="alpine-keys"
-	pkgdesc="Alpine release data"
-
-	mkdir -p "$subpkgdir"
-}