main/kmscube: drop, upstreamed to Alpine (MR 2277)

https://gitlab.alpinelinux.org/alpine/aports/-/blob/master/community/kmscube/APKBUILD

main/kmscube/APKBUILD

-# Maintainer: Zhuowei Zhang <zhuoweizhang@yahoo.com>
-pkgname=kmscube
-pkgver=0_git20200401
-pkgrel=1
-_commit="4660a7dca6512b6e658759d00cff7d4ad2a2059d"
-pkgdesc="Simple demo for testing kernel mode setting support"
-url="https://gitlab.freedesktop.org/mesa/kmscube"
-arch="all"
-license="MIT"
-makedepends="libdrm-dev libpng-dev mesa-dev meson"
-source="https://gitlab.freedesktop.org/mesa/kmscube/-/archive/$_commit/kmscube-$_commit.tar.gz"
-options="!check" # No tests
-builddir="$srcdir/kmscube-$_commit"
-
-build() {
-	abuild-meson . output
-	meson compile ${JOBS:+-j ${JOBS}} -C output
-}
-
-package() {
-	DESTDIR="$pkgdir" meson install -C output
-}
-
-sha512sums="6aeaeadb19d537b41ec2fd30fda660850b5a1eabe1795140c165144c0b1c7d1165c89e79efd7ea075be0b6db60796206b71c475263d8bb5e6e0d09c1753e61d5  kmscube-4660a7dca6512b6e658759d00cff7d4ad2a2059d.tar.gz"