Runs the test case.
Document doc;
Element rootNode;
NodeList childList;
Node childToRemove;
Node removedChild;
Node parentNode;
doc = (Document) load("staff", true);
rootNode = doc.getDocumentElement();
childList = rootNode.getChildNodes();
childToRemove = childList.item(1);
removedChild = rootNode.removeChild(childToRemove);
parentNode = removedChild.getParentNode();
assertNull("nodeRemoveChildAssert1", parentNode);