Cleanup cc/OWNERS for animation

  * Remove cc/animation/OWNERS; we prefer to list things in top-level
    cc/OWNERS file.
  * Remove loyso@ as animation OWNER; no longer reviews animation CLs.
  * Remove vollick@ as animation OWNER; no longer reviews animation CLs.
  * Add smcgruer@ as animation OWNER.

Bug: None
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.android:android_optional_gpu_tests_rel
Change-Id: Iea0f9776da914deb8e4148bc8dc470a1653feecf
Reviewed-on: https://chromium-review.googlesource.com/926569Reviewed-by: Robert Flack <flackr@chromium.org>
Commit-Queue: Stephen McGruer <smcgruer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#537788}

cc/OWNERS

@@ -46,9 +46,9 @@ vollick@chromium.org
 weiliangc@chromium.org
 
 # animation
-vollick@chromium.org
 ajuma@chromium.org
 flackr@chromium.org
+smcgruer@chromium.org
 
 # images
 ericrk@chromium.org

cc/animation/OWNERS

-loyso@chromium.org
-
-# TEAM: threaded-rendering-dev@chromium.org
-# COMPONENT: Internals>Compositing>Animation