[ASCellNode] Apply layout delegate behavior in -__setNeedsLayout, not -setNeedsLayout

AsyncDisplayKit/ASCellNode.h

@@ -34,6 +34,10 @@ typedef NS_ENUM(NSUInteger, ASCellNodeVisibilityEvent) {
 
 /**
  * Generic cell node.  Subclass this instead of `ASDisplayNode` to use with `ASTableView` and `ASCollectionView`.
+ 
+ * @note When a cell node is contained inside a collection view (or table view),
+ * calling `-setNeedsLayout` will also notify the collection on the main thread
+ * so that the collection can update its item layout if the cell's size changed.
  */
 @interface ASCellNode : ASDisplayNode
 
@@ -85,17 +89,6 @@ typedef NS_ENUM(NSUInteger, ASCellNodeVisibilityEvent) {
 - (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(nullable UIEvent *)event ASDISPLAYNODE_REQUIRES_SUPER;
 - (void)touchesCancelled:(nullable NSSet<UITouch *> *)touches withEvent:(nullable UIEvent *)event ASDISPLAYNODE_REQUIRES_SUPER;
 
-/**
- * Marks the node as needing layout. Convenience for use whether the view / layer is loaded or not.
- *
- * If this node was measured, calling this method triggers an internal relayout: the calculated layout is invalidated,
- * and the supernode is notified or (if this node is the root one) a full measurement pass is executed using the old constrained size.
- * The delegate will then be notified on main thread.
- *
- * This method can be called inside of an animation block (to animate all of the layout changes).
- */
-- (void)setNeedsLayout;
-
 /**
  * @abstract Initializes a cell with a given view controller block.
  *