Sync with jackson-core TreeNode changes

Author: cowtowncoder

src/main/java/tools/jackson/databind/node/ObjectNode.java

@@ -293,16 +293,9 @@ public Collection<String> propertyNames() {
         return _children.keySet();
     }
 
-    @Override
-    public Spliterator<String> propertyNameSpliterator() {
-        return _children.keySet().spliterator();
-    }
-
     /**
      * Method to use for accessing all properties (with both names
      * and values) of this JSON Object.
-     *
-     * @since 2.15
      */
     @Override
     public Set<Map.Entry<String, JsonNode>> properties() {

src/test/java/tools/jackson/databind/node/ArrayNodeTest.java

@@ -38,7 +38,6 @@ public void testDirectCreation() throws Exception
         assertFalse(n.values().iterator().hasNext());
         assertEquals(0, n.valueSpliterator().estimateSize());
         assertTrue(n.propertyNames().isEmpty());
-        assertNotNull(n.propertyNameSpliterator());
         assertTrue(n.isEmpty());
         TextNode text = TextNode.valueOf("x");
         n.add(text);