Minor cleanup and refactoring.

src/AnimGraph/AnimGraphData.h

@@ -103,6 +103,8 @@ enum class AnimGraphType {
   GraphTypeLast
 };
 
+/*** Defines data on which an animation graph is executed (i.e. skeleton, animations).
+ */
 struct AnimGraphContext {
   AnimGraph* m_graph = nullptr;
   ozz::animation::Skeleton* m_skeleton = nullptr;