Deprecate: osbuild user guide

README.md

@@ -119,7 +119,6 @@ Most of us will not use these tools directly, but useful for developers:
 	- [apt2ostree](https://github.com/stb-tester/apt2ostree) - apt2ostree is used for building Debian/Ubuntu based ostree images. It performs the same task as debootstrap/multistrap but the output is an ostree tree rather than a rootfs in a directory.
 - [Endless OSTree Builder](https://github.com/dbnicholson/deb-ostree-builder) - Stripped down Endless ostree builder for Debian
 - [Image Builder - osbuild](https://www.osbuild.org/) - Build Infrastructure for Operating Systems
-	- [osbuild user guide](https://www.osbuild.org/guides/user-guide/user-guide.html)
 - [ABRoot](https://github.com/Vanilla-OS/ABRoot) - A utility which provides full immutability and atomicity to a Linux system, by transacting between two root filesystems. Updates are performed using OCI images, to ensure that the system is always in a consistent state.
 - [BootC](https://github.com/containers/bootc) - Transactional, in-place operating system updates using OCI/Docker container images. (Experimental)
 - [bootupd](https://github.com/coreos/bootupd) - Distribution-independent updates for bootloaders.