Branches: update rust since it is archived now

Signed-off-by: Miguel Ojeda <ojeda@kernel.org>

Author: ojeda

src/Branches.md

@@ -34,10 +34,8 @@ Note that this branch may be updated/rebased frequently and it might be gone in
 
 [`rust`](https://github.com/Rust-for-Linux/linux/tree/rust) was the original branch where development happened for two years before Rust support was merged into the kernel.
 
-It contains most of the abstractions that the project worked on as a prototype/showcase. Some of those will eventually land upstream, others may be reworked with feedback from upstream, and a few may be dropped if unneeded.
+It contains most of the abstractions that the project worked on as a prototype/showcase. Some of those may eventually land upstream, others may be reworked with feedback from upstream, and a few may be dropped if unneeded.
 
-The branch is now effectively frozen, and generally the only changes that are merged into it are intended to minimize the difference with respect to mainline. When the diff is small enough, the branch will be archived/removed. Until then, the branch is useful to see what is left to upstream, and for some downstream projects to base their work on top.
+The branch is now archived, thus no new changes are merged into it. While it may be deleted eventually, for the moment it is kept around since some of the code did not make it upstream and may be useful for others.
 
-However, please feel free to submit new PRs for this branch. This is useful so that others are aware of [what you are working on](Contributing.md). Even if you cannot submit a PR, please consider [telling us](Contact.md) about it.
-
-Changes to this branch land via [GitHub PRs](https://github.com/Rust-for-Linux/linux/pulls). GitHub Actions is used as a pre-merge CI, compiling the kernel and booting it under QEMU for different toolchains, architectures and configurations. It also checks that some tests passed (e.g. loading sample modules, KUnit tests...) as well as building the PR under Clippy, building the docs, checking `rustfmt`, etc. [KernelCI](https://linux.kernelci.org/job/rust-for-linux/branch/rust/) tests it. Finally, in the past, the [Ksquirrel](Ksquirrel.md) bot checked the PRs sent to it.
+Changes to this branch landed via [GitHub PRs](https://github.com/Rust-for-Linux/linux/pulls). GitHub Actions was used as a pre-merge CI, compiling the kernel and booting it under QEMU for different toolchains, architectures and configurations. It also checked that some tests passed (e.g. loading sample modules, KUnit tests...) as well as building the PR under Clippy, building the docs, checking `rustfmt`, etc. [KernelCI](https://linux.kernelci.org/job/rust-for-linux/branch/rust/) tests it. Finally, in the past, the [Ksquirrel](Ksquirrel.md) bot checked the PRs sent to it.