cc: Delete unused AnimationCurve::AffectsScale and related code

cc/animation/element_animations.cc

Index: cc/animation/element_animations.cc
diff --git a/cc/animation/element_animations.cc b/cc/animation/element_animations.cc
index 32da627aa5cbbc9957830a1113137a6e10ff817f..b9bdc0b80f87afd609fd1b4b06eb21c1c6e41945 100644
--- a/cc/animation/element_animations.cc
+++ b/cc/animation/element_animations.cc
@@ -384,16 +384,6 @@ bool ElementAnimations::TransformAnimationBoundsForBox(
   return true;
 }
 
-bool ElementAnimations::HasAnimationThatAffectsScale() const {
-  ElementAnimations::PlayersList::Iterator it(players_list_.get());
-  AnimationPlayer* player;
-  while ((player = it.GetNext()) != nullptr) {
-    if (player->HasAnimationThatAffectsScale())
-      return true;
-  }
-  return false;
-}
-
 bool ElementAnimations::HasOnlyTranslationTransforms(
     ElementListType list_type) const {
   ElementAnimations::PlayersList::Iterator it(players_list_.get());