Update for stabilized features.

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "euclid"
-version = "0.6.6"
+version = "0.6.7"
 authors = ["The Servo Project Developers"]
 description = "Geometry primitives"
 documentation = "http://doc.servo.org/euclid/"

src/length.rs

@@ -16,7 +16,6 @@ use num_traits::NumCast;
 use serde::{Deserialize, Deserializer, Serialize, Serializer};
 use std::cmp::Ordering;
 use std::ops::{Add, Sub, Mul, Div, Neg};
-#[cfg(feature = "unstable")]
 use std::ops::{AddAssign, SubAssign};
 use std::marker::PhantomData;
 
@@ -73,7 +72,6 @@ impl<U, T: Clone + Add<T, Output=T>> Add for Length<U, T> {
 }
 
 // length += length
-#[cfg(feature = "unstable")]
 impl<U, T: Clone + AddAssign<T>> AddAssign for Length<U, T> {
     fn add_assign(&mut self, other: Length<U, T>) {
         self.0 += other.get();
@@ -89,7 +87,6 @@ impl<U, T: Clone + Sub<T, Output=T>> Sub<Length<U, T>> for Length<U, T> {
 }
 
 // length -= length
-#[cfg(feature = "unstable")]
 impl<U, T: Clone + SubAssign<T>> SubAssign for Length<U, T> {
     fn sub_assign(&mut self, other: Length<U, T>) {
         self.0 -= other.get();
@@ -227,7 +224,6 @@ mod tests {
         assert_eq!(negative_zero_feet.get(), 0.0);
     }
 
-    #[cfg(feature = "unstable")]
     #[test]
     fn test_addassign() {
         let one_cm: Length<Mm, f32> = Length::new(10.0);
@@ -238,7 +234,6 @@ mod tests {
         assert_eq!(measurement.get(), 15.0);
     }
 
-    #[cfg(feature = "unstable")]
     #[test]
     fn test_subassign() {
         let one_cm: Length<Mm, f32> = Length::new(10.0);

src/lib.rs

@@ -7,8 +7,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![cfg_attr(feature = "unstable", feature(asm, repr_simd, test, augmented_assignments, op_assign_traits))]
-#![cfg_attr(feature = "unstable", feature(deprecated))]
+#![cfg_attr(feature = "unstable", feature(asm, repr_simd, test))]
 
 #![cfg_attr(feature = "plugins", feature(custom_derive, plugin))]
 #![cfg_attr(feature = "plugins", plugin(heapsize_plugin))]