libcore: remove unneeded allow(deprecated)

src/libcore/fmt/mod.rs

@@ -2048,7 +2048,7 @@ macro_rules! tuple {
     ( $($name:ident,)+ ) => (
         #[stable(feature = "rust1", since = "1.0.0")]
         impl<$($name:Debug),*> Debug for ($($name,)*) where last_type!($($name,)+): ?Sized {
-            #[allow(non_snake_case, unused_assignments, deprecated)]
+            #[allow(non_snake_case, unused_assignments)]
             fn fmt(&self, f: &mut Formatter) -> Result {
                 let mut builder = f.debug_tuple("");
                 let ($(ref $name,)*) = *self;

src/libcore/fmt/num.rs

@@ -1,7 +1,5 @@
 //! Integer and floating-point number formatting
 
-#![allow(deprecated)]
-
 
 use fmt;
 use ops::{Div, Rem, Sub};

src/libcore/hash/sip.rs

@@ -1,6 +1,6 @@
 //! An implementation of SipHash.
 
-#![allow(deprecated)]
+#![allow(deprecated)] // the types in this module are deprecated
 
 use marker::PhantomData;
 use ptr;