Move default spacing out of csslayout

Summary: The concept of default padding was confusing and only used by react-native android. Makes more sense to let them manage this themselve.

Reviewed By: foghina

Differential Revision: D3709574

fbshipit-source-id: 6e0277bd97407a5c642d742f93ca2ac70d7307da

java/com/facebook/csslayout/CSSNode.java

@@ -553,16 +553,6 @@ public class CSSNode implements CSSNodeAPI<CSSNode> {
     return layout.direction;
   }
 
-  /**
-   * Set a default padding (left/top/right/bottom) for this node.
-   */
-  @Override
-  public void setDefaultPadding(int spacingType, float padding) {
-    if (style.padding.setDefault(spacingType, padding)) {
-      dirty();
-    }
-  }
-
   /**
    * Get this node's overflow property, as defined in the style
    */