Clean up some type projections

src/rotation.rs

@@ -32,8 +32,8 @@ use vector::{Vector2, Vector3};
 /// creates a circular motion, and preserves at least one point in the space.
 pub trait Rotation<P: EuclideanSpace>: Sized + Copy + One where
     // FIXME: Ugly type signatures - blocked by rust-lang/rust#24092
-    Self: ApproxEq<Epsilon = <P as EuclideanSpace>::Scalar>,
-    <P as EuclideanSpace>::Scalar: BaseFloat,
+    Self: ApproxEq<Epsilon = P::Scalar>,
+    P::Scalar: BaseFloat,
     Self: iter::Product<Self>,
 {
     /// Create a rotation to a given direction with an 'up' vector.

src/transform.rs

@@ -64,9 +64,9 @@ pub struct Decomposed<V: VectorSpace, R> {
 }
 
 impl<P: EuclideanSpace, R: Rotation<P>> Transform<P> for Decomposed<P::Diff, R>
-    where <P as EuclideanSpace>::Scalar: BaseFloat,
+    where P::Scalar: BaseFloat,
           // FIXME: Investigate why this is needed!
-          <P as EuclideanSpace>::Diff: VectorSpace
+          P::Diff: VectorSpace
 {
     #[inline]
     fn one() -> Decomposed<P::Diff, R> {