remove unnecessary CoerceUnsized impl

RalfJung · RalfJung · commit 3dcdb8a83e95 · 2018-08-06T15:52:27.000+02:00
diff --git a/src/libcore/mem.rs b/src/libcore/mem.rs
@@ -1024,9 +1024,6 @@ impl<T: ?Sized> DerefMut for ManuallyDrop<T> {
     }
 }
 
-#[unstable(feature = "coerce_unsized", issue = "27732")]
-impl<T: CoerceUnsized<U>, U> CoerceUnsized<ManuallyDrop<U>> for ManuallyDrop<T> {}
-
 /// A pinned reference.
 ///
 /// A pinned reference is a lot like a mutable reference, except that it is not

Original file line number	Diff line number	Diff line change
`@@ -1024,9 +1024,6 @@ impl<T: ?Sized> DerefMut for ManuallyDrop<T> {`
`1024`	`1024`	`}`
`1025`	`1025`	`}`
`1026`	`1026`
`1027`		`-#[unstable(feature = "coerce_unsized", issue = "27732")]`
`1028`		`-impl<T: CoerceUnsized<U>, U> CoerceUnsized<ManuallyDrop<U>> for ManuallyDrop<T> {}`
`1029`		`-`
`1030`	`1027`	`/// A pinned reference.`
`1031`	`1028`	`///`
`1032`	`1029`	`/// A pinned reference is a lot like a mutable reference, except that it is not`