Register new snapshots.

src/libsyntax/ptr.rs

@@ -38,7 +38,6 @@
 
 use std::fmt::{self, Show};
 use std::hash::{Hash, Hasher};
-#[cfg(stage0)] use std::hash::Writer;
 use std::ops::Deref;
 use std::ptr;
 
@@ -107,13 +106,6 @@ impl<T: Show> Show for P<T> {
     }
 }
 
-#[cfg(stage0)]
-impl<S: Writer, T: Hash<S>> Hash<S> for P<T> {
-    fn hash(&self, state: &mut S) {
-        (**self).hash(state);
-    }
-}
-#[cfg(not(stage0))]
 impl<S: Hasher, T: Hash<S>> Hash<S> for P<T> {
     fn hash(&self, state: &mut S) {
         (**self).hash(state);