vulkan_headers: drop in favour of sys-libs/vulkan

dev-libs/vulkan_headers/vulkan_headers-1.2.196.recipe

@@ -1,48 +0,0 @@
-SUMMARY="Header files for Vulkan graphics API"
-DESCRIPTION="vulkan_headers™ (Vulkan graphics API) is a low-level \
-cross-platform 3D graphics and compute API. Vulkan is an explicit API, \
-enabling direct control over how GPUs actually work. As such, Vulkan \
-supports systems that have multiple GPUs, each running with a different \
-driver, or ICD (Installable Client Driver). Vulkan also supports multiple \
-global contexts (instances, in Vulkan terminology). The ICD loader is a \
-library that is placed between a Vulkan application and any number of \
-Vulkan drivers, in order to support multiple drivers and the instance-level \
-functionality that works across these drivers. Additionally, the loader \
-manages inserting Vulkan layer libraries, such as validation layers, between \
-an application and the drivers."
-HOMEPAGE="https://www.khronos.org/registry/vulkan/"
-COPYRIGHT="2015-2021 The Khronos Group Inc."
-LICENSE="MIT"
-REVISION="1"
-SOURCE_URI="https://github.com/KhronosGroup/Vulkan-Headers/archive/refs/tags/v$portVersion.tar.gz"
-CHECKSUM_SHA256="33cb99194b5ab082beb00bda1e96311dfe2cb20b0037b6d4c8ae926a50f5a750"
-SOURCE_DIR="Vulkan-Headers-$portVersion"
-
-ARCHITECTURES="all !x86_gcc2"
-SECONDARY_ARCHITECTURES="x86"
-
-PROVIDES="
-	vulkan_headers$secondaryArchSuffix = $portVersion
-	devel:vulkan_headers$secondaryArchSuffix = $portVersion
-	"
-
-BUILD_PREREQUIRES="
-	cmd:cmake
-	cmd:make
-	"
-
-BUILD ()
-{
-	cmake -Bbuild \
-		-DCMAKE_BUILD_TYPE=Release \
-		-DCMAKE_INSTALL_PREFIX=$includeDir \
-		-DCMAKE_INSTALL_DATADIR=$dataDir
-	make -C build
-}
-
-INSTALL()
-{
-	make -C build install
-	mkdir -p $docDir/vulkan
-	cp LICENSE.txt README.md $docDir/vulkan
-}