Stop using box_into_pin feature

Author: Nemo157

futures-util/src/future/join_all.rs

@@ -116,7 +116,7 @@ where
     I::Item: Future,
 {
     let elems: Box<[_]> = i.into_iter().map(ElemState::Pending).collect();
-    JoinAll { elems: Box::into_pin(elems) }
+    JoinAll { elems: elems.into() }
 }
 
 impl<F> Future for JoinAll<F>

futures-util/src/lib.rs

@@ -1,7 +1,6 @@
 //! Combinators and utilities for working with `Future`s, `Stream`s, `Sink`s,
 //! and the `AsyncRead` and `AsyncWrite` traits.
 
-#![cfg_attr(feature = "alloc", feature(box_into_pin))]
 #![cfg_attr(feature = "async-await", feature(async_await, await_macro))]
 #![cfg_attr(feature = "cfg-target-has-atomic", feature(cfg_target_has_atomic))]
 #![cfg_attr(feature = "never-type", feature(never_type))]

futures-util/src/try_future/try_join_all.rs

@@ -125,7 +125,7 @@ where
 {
     let elems: Box<[_]> = i.into_iter().map(ElemState::Pending).collect();
     TryJoinAll {
-        elems: Box::into_pin(elems),
+        elems: elems.into(),
     }
 }