Past branches: reword to use the past tense

Signed-off-by: Miguel Ojeda <[email protected]>

Author: ojeda

src/Past-branches.md

@@ -1,6 +1,6 @@
 # Past branches
 
-These branches are unmaintained, archived, deprecated, frozen or do not exist anymore in the repository.
+These branches are unmaintained, archived, deprecated, frozen or do not exist anymore in the repository. Historical details about them follow.
 
 ## `rust`
 
@@ -16,52 +16,50 @@ Changes to this branch landed via [GitHub PRs](https://github.com/Rust-for-Linux
 
 ## `rust-dev`
 
-[`rust-dev`](https://github.com/Rust-for-Linux/linux/tree/rust-dev) is an experimental branch for integration purposes. It is a queue for patches that "look good enough".
+[`rust-dev`](https://github.com/Rust-for-Linux/linux/tree/rust-dev) was an experimental branch for integration purposes. It was a queue for patches that "looked good enough".
 
-Its intended use cases are:
+Its intended use cases were:
 
   - Finding merge/apply conflicts as early as possible.
-  - Providing a common base for development that requires features that are not yet in mainline or `rust-next`, i.e. giving early access to features. This may include Rust-related changes from other subsystems, but it is not intended to cover our topic branches.
+  - Providing a common base for development that requires features that are not yet in mainline or `rust-next`, i.e. giving early access to features. This may include Rust-related changes from other subsystems, but it was not intended to cover our topic branches.
   - Providing extra testing to patches by making them easily available to more developers.
 
-Note that this branch may be updated/rebased frequently and it might be gone in the future. Currently, it is on hold.
+This branch was intended to be updated/rebased frequently.
 
 ## Topic branches (`staging/*`)
 
-These branches were focused on a particular topic and were meant to enable collaboration on code that is targeted for upstreaming but has not reached mainline yet.
+These branches were focused on a particular topic and were meant to enable collaboration on code that is targeted for upstreaming but has not reached mainline yet. The intention was to make it easy to request/add new ones.
 
 Some of these branches may contain work-in-progress code (similar to [staging trees](https://docs.kernel.org/process/2.Process.html?highlight=staging#staging-trees)) that may not be suitable for upstreaming or general usage yet. Please check the details of each branch.
 
-Changes to these branches land via GitHub PRs. Nevertheless, contributions should still follow the usual Linux kernel development process — see [Contributing](Contributing.md) for details.
-
-If you are interested in maintaining a new topic branch, then please [contact us](Contact.md). Thank you!
+Changes to these branches landed via GitHub PRs. Nevertheless, contributions should still follow the usual Linux kernel development process — see [Contributing](Contributing.md) for details.
 
 ### `staging/dev`
 
-[`staging/dev`](https://github.com/Rust-for-Linux/linux/tree/staging/dev) is a branch intended to integrate the other topic branches (similar to the role of `rust-dev` for the main branches).
+[`staging/dev`](https://github.com/Rust-for-Linux/linux/tree/staging/dev) was a branch intended to integrate the other topic branches (similar to the role of `rust-dev` for the main branches).
 
-It is maintained by Danilo Krummrich and Philipp Stanner. Please contact them through [Zulip](Contact.md#zulip-chat).
+It was maintained by Danilo Krummrich and Philipp Stanner. You could contact them through [Zulip](Contact.md#zulip-chat).
 
 ### `staging/rust-device`
 
-[`staging/rust-device`](https://github.com/Rust-for-Linux/linux/tree/staging/rust-device) is dedicated to device/driver-related abstractions.
+[`staging/rust-device`](https://github.com/Rust-for-Linux/linux/tree/staging/rust-device) was dedicated to device/driver-related abstractions.
 
-The branch is kept in a compilable state (rebased regularly on top of `rust-next` or mainline). Fixes and features are welcome.
+The branch was kept in a compilable state (rebased regularly on top of `rust-next` or mainline). Fixes and features were welcome.
 
-It is maintained by Danilo Krummrich and Philipp Stanner. Please contact them through [Zulip](Contact.md#zulip-chat).
+It was maintained by Danilo Krummrich and Philipp Stanner. You could contact them through [Zulip](Contact.md#zulip-chat).
 
 ### `staging/rust-net`
 
-[`staging/rust-net`](https://github.com/Rust-for-Linux/linux/tree/staging/rust-net) is dedicated to networking-related abstractions.
+[`staging/rust-net`](https://github.com/Rust-for-Linux/linux/tree/staging/rust-net) was dedicated to networking-related abstractions.
 
-The branch is kept in a compilable state (rebased regularly on top of `rust-next` or mainline). Fixes and features are welcome.
+The branch was kept in a compilable state (rebased regularly on top of `rust-next` or mainline). Fixes and features were welcome.
 
-It is maintained by Trevor Gross and Valentin Obst. Please contact them through [Zulip](Contact.md#zulip-chat).
+It was maintained by Trevor Gross and Valentin Obst. You could contact them through [Zulip](Contact.md#zulip-chat).
 
 ### `staging/rust-pci`
 
-[`staging/rust-pci`](https://github.com/Rust-for-Linux/linux/tree/staging/rust-pci) is dedicated to PCI-related abstractions, which are used by e.g. the [NVMe driver](NVMe-driver.md).
+[`staging/rust-pci`](https://github.com/Rust-for-Linux/linux/tree/staging/rust-pci) was dedicated to PCI-related abstractions, which were used by e.g. the [NVMe driver](NVMe-driver.md).
 
-The branch is kept in a compilable state (rebased regularly on top of `rust-next` or mainline). Fixes and features are welcome.
+The branch was kept in a compilable state (rebased regularly on top of `rust-next` or mainline). Fixes and features were welcome.
 
-Danilo Krummrich is `rust-pci`'s maintainer. You can also contact him through [Zulip](Contact.md#zulip-chat).
+It was maintained by Danilo Krummrich. You could contact him through [Zulip](Contact.md#zulip-chat).