Remove `impl Foo for ..` in favor of `auto trait Foo`

No longer parse it.
Remove AutoTrait variant from AST and HIR.
Remove backwards compatibility lint.
Remove coherence checks, they make no sense for the new syntax.
Remove from rustdoc.

1 files changed, 2 insertions, 9 deletions

diff --git a/src/libstd/panic.rs b/src/libstd/panic.rs
index 219e55d6c12..1be3844e29a 100644
--- a/src/libstd/panic.rs
+++ b/src/libstd/panic.rs
@@ -187,10 +187,7 @@ pub struct AssertUnwindSafe<T>(
 // * Unique, an owning pointer, lifts an implementation
 // * Types like Mutex/RwLock which are explicilty poisoned are unwind safe
 // * Our custom AssertUnwindSafe wrapper is indeed unwind safe
-#[stable(feature = "catch_unwind", since = "1.9.0")]
-#[allow(unknown_lints)]
-#[allow(auto_impl)]
-impl UnwindSafe for .. {}
+
 #[stable(feature = "catch_unwind", since = "1.9.0")]
 impl<'a, T: ?Sized> !UnwindSafe for &'a mut T {}
 #[stable(feature = "catch_unwind", since = "1.9.0")]
@@ -219,14 +216,10 @@ impl<T: RefUnwindSafe + ?Sized> UnwindSafe for Rc<T> {}
 impl<T: RefUnwindSafe + ?Sized> UnwindSafe for Arc<T> {}
 
 // Pretty simple implementations for the `RefUnwindSafe` marker trait,
-// basically just saying that this is a marker trait and `UnsafeCell` is the
+// basically just saying that `UnsafeCell` is the
 // only thing which doesn't implement it (which then transitively applies to
 // everything else).
 #[stable(feature = "catch_unwind", since = "1.9.0")]
-#[allow(unknown_lints)]
-#[allow(auto_impl)]
-impl RefUnwindSafe for .. {}
-#[stable(feature = "catch_unwind", since = "1.9.0")]
 impl<T: ?Sized> !RefUnwindSafe for UnsafeCell<T> {}
 #[stable(feature = "catch_unwind", since = "1.9.0")]
 impl<T> RefUnwindSafe for AssertUnwindSafe<T> {}