servo: Merge #9110 - Hoist the rest of css/matching.rs (and its dependencies) into style/ (from bholley:hoist_matching_and_animation); r=SimonSapin

Slowly but surely.

This goes on top of #9103.

Fixes #9103.

Source-Repo: https://github.com/servo/servo
Source-Revision: f3075d13191df9b9c7858b324122872d057fbe4d

servo/components/layout/lib.rs

@@ -96,7 +96,3 @@ mod table_wrapper;
 mod text;
 mod traversal;
 mod wrapper;
-
-mod css {
-    pub mod matching;
-}