style: Implement ComputeSquaredDistance for individual transforms.

We manually implement ComputeSquaredDistance for Translate, Rotate, and
Scale because we have to handle mismatch cases, and actually we don't
need to implement it for specified types.

Differential Revision: https://phabricator.services.mozilla.com/D11935

components/style/values/generics/transform.rs

@@ -530,7 +530,6 @@ pub fn get_normalized_vector_and_angle<T: Zero>(
 
 #[derive(
     Clone,
-    ComputeSquaredDistance,
     Copy,
     Debug,
     MallocSizeOf,
@@ -600,7 +599,6 @@ where
 
 #[derive(
     Clone,
-    ComputeSquaredDistance,
     Copy,
     Debug,
     MallocSizeOf,
@@ -649,7 +647,6 @@ impl<Number: ToCss + PartialEq> ToCss for Scale<Number> {
 
 #[derive(
     Clone,
-    ComputeSquaredDistance,
     Debug,
     MallocSizeOf,
     PartialEq,