Arbitrary self types v2: stabilize test changes

All the test changes necessary for stabilization here.

Author: adetaylor

compiler/rustc_codegen_cranelift/example/mini_core.rs

@@ -47,13 +47,6 @@ impl<T: ?Sized + Unsize<U>, U: ?Sized> DispatchFromDyn<*const U> for *const T {}
 impl<T: ?Sized + Unsize<U>, U: ?Sized> DispatchFromDyn<*mut U> for *mut T {}
 impl<T: ?Sized + Unsize<U>, U: ?Sized> DispatchFromDyn<Box<U>> for Box<T> {}
 
-#[lang = "legacy_receiver"]
-pub trait LegacyReceiver {}
-
-impl<T: ?Sized> LegacyReceiver for &T {}
-impl<T: ?Sized> LegacyReceiver for &mut T {}
-impl<T: ?Sized> LegacyReceiver for Box<T> {}
-
 #[lang = "copy"]
 pub unsafe trait Copy {}
 

compiler/rustc_codegen_gcc/example/mini_core.rs

@@ -44,13 +44,6 @@ impl<T: ?Sized+Unsize<U>, U: ?Sized> DispatchFromDyn<*const U> for *const T {}
 impl<T: ?Sized+Unsize<U>, U: ?Sized> DispatchFromDyn<*mut U> for *mut T {}
 impl<T: ?Sized + Unsize<U>, U: ?Sized> DispatchFromDyn<Box<U, ()>> for Box<T, ()> {}
 
-#[lang = "legacy_receiver"]
-pub trait LegacyReceiver {}
-
-impl<T: ?Sized> LegacyReceiver for &T {}
-impl<T: ?Sized> LegacyReceiver for &mut T {}
-impl<T: ?Sized, A: Allocator> LegacyReceiver for Box<T, A> {}
-
 #[lang = "copy"]
 pub unsafe trait Copy {}