Breaking remove YogaNode#clone

Summary:
@public

The cloning features of YogaNode don’t seem to be used. Let’s remove them.

Reviewed By: SidharthGuglani

Differential Revision: D14165624

fbshipit-source-id: 5b710964a4abf1b35f3bcc25b143ffc719a03cec

java/com/facebook/yoga/YogaConfig.java

@@ -98,16 +98,4 @@ public class YogaConfig {
   public YogaLogger getLogger() {
     return mLogger;
   }
-
-  private native void jni_YGConfigSetHasCloneNodeFunc(long nativePointer, boolean hasClonedFunc);
-
-  public void setOnCloneNode(YogaNodeCloneFunction cloneYogaNodeFunction) {
-    mYogaNodeCloneFunction = cloneYogaNodeFunction;
-    jni_YGConfigSetHasCloneNodeFunc(mNativePointer, cloneYogaNodeFunction != null);
-  }
-
-  @DoNotStrip
-  private final YogaNodeJNI cloneNode(YogaNodeJNI oldNode, YogaNodeJNI parent, int childIndex) {
-    return (YogaNodeJNI) mYogaNodeCloneFunction.cloneNode(oldNode, parent, childIndex);
-  }
 }