[docs/rust] Remove `futures_api` feature
We no longer need this feature on our toolchain.
Change-Id: Iae2df57a833cd38d7ca625ba61f4087e6d4e6dd0
diff --git a/docs/development/languages/rust/unstable.md b/docs/development/languages/rust/unstable.md
index 904cb27..3222089 100644
--- a/docs/development/languages/rust/unstable.md
+++ b/docs/development/languages/rust/unstable.md
@@ -90,14 +90,6 @@
introduced by these features. There are changes planned to the implementation, but they’re
mostly polish, performance optimizations, and a few scattered bugfixes.
* Owner: cramertj@
-* `futures_api`
- * Summary: This feature enables the `std::task` and `std::future` modules which provide the
- `Future` interface for the standard library.
- * Use in Fuchsia: Needed for `async_await`
- * Remaining before stabilization: As in async/await, cramertj@ wrote the implementation of
- this feature, and while its surface area is large, there aren’t significant planned
- changes to it. cramertj@ will manage any necessary transition.
- * Owner: cramertj@
[the edition guide]: https://rust-lang-nursery.github.io/edition-guide/editions/index.html
[Rust 2018: an early preview]: https://internals.rust-lang.org/t/rust-2018-an-early-preview/7776
