Revert impl for Checked and Saturating

traits/src/ops/checked.rs

@@ -1,5 +1,4 @@
 use std::ops::{Add, Sub, Mul, Div};
-use std::num::Wrapping;
 
 /// Performs addition that returns `None` instead of wrapping around on
 /// overflow.
@@ -91,33 +90,3 @@ checked_impl!(CheckedDiv, checked_div, i32);
 checked_impl!(CheckedDiv, checked_div, i64);
 checked_impl!(CheckedDiv, checked_div, isize);
 
-// Was skeptical at first, since checked ops somewhat defeat the point of
-// Wrapping<T>, but there are more pros than cons IMO :
-// - These are methods, so users still have to be explicit about their intent;
-// - Wrapping<T> could be used for to enforce wrapping semantics _most of the time_, 
-//   and only have a handful of places where they want to perform checked ops;
-// - This allows Wrapping<T> to implement PrimInt.
-impl<T: CheckedAdd> CheckedAdd for Wrapping<T> where Wrapping<T>: Add<Output = Wrapping<T>>{
-    #[inline]
-    fn checked_add(&self, v: &Self) -> Option<Self> {
-        self.0.checked_add(&v.0).map(Wrapping)
-    }
-}
-impl<T: CheckedSub> CheckedSub for Wrapping<T> where Wrapping<T>: Sub<Output = Wrapping<T>> {
-    #[inline]
-    fn checked_sub(&self, v: &Self) -> Option<Self> {
-        self.0.checked_sub(&v.0).map(Wrapping)
-    }
-}
-impl<T: CheckedMul> CheckedMul for Wrapping<T> where Wrapping<T>: Mul<Output = Wrapping<T>>{
-    #[inline]
-    fn checked_mul(&self, v: &Self) -> Option<Self> {
-        self.0.checked_mul(&v.0).map(Wrapping)
-    }
-}
-impl<T: CheckedDiv> CheckedDiv for Wrapping<T> where Wrapping<T>: Div<Output = Wrapping<T>> {
-    #[inline]
-    fn checked_div(&self, v: &Self) -> Option<Self> {
-        self.0.checked_div(&v.0).map(Wrapping)
-    }
-}

traits/src/ops/saturating.rs

@@ -1,5 +1,3 @@
-use std::num::Wrapping;
-
 /// Saturating math operations
 pub trait Saturating {
     /// Saturating addition operator.
@@ -28,10 +26,3 @@ macro_rules! saturating_impl {
 }
 
 saturating_impl!(Saturating for isize usize i8 u8 i16 u16 i32 u32 i64 u64);
-
-impl<T: Saturating> Saturating for Wrapping<T> {
-    #[inline]
-    fn saturating_add(self, v: Self) -> Self { Wrapping(self.0.saturating_add(v.0)) }
-    #[inline]
-    fn saturating_sub(self, v: Self) -> Self { Wrapping(self.0.saturating_sub(v.0)) }
-}