Remove Unused measure DocumentCreateAttributeNS

LayoutTests/fast/css/lang-mapped-to-webkit-locale-dynamic.xhtml

Index: LayoutTests/fast/css/lang-mapped-to-webkit-locale-dynamic.xhtml
diff --git a/LayoutTests/fast/css/lang-mapped-to-webkit-locale-dynamic.xhtml b/LayoutTests/fast/css/lang-mapped-to-webkit-locale-dynamic.xhtml
index ca2f68398162c5dde2013e0ec2c4244c89691432..a80e96a74df9ab7bc2ea21cf39f678dfa003407e 100644
--- a/LayoutTests/fast/css/lang-mapped-to-webkit-locale-dynamic.xhtml
+++ b/LayoutTests/fast/css/lang-mapped-to-webkit-locale-dynamic.xhtml
@@ -31,21 +31,6 @@ function runTest() {
     x3.removeAttribute("lang");
     shouldBeEqualToString("localeOfNode('x3')", "ja");
 
-    // The "lang" attribute in the XML namespace should affect locale (since this is an XHTML document).
-    var attr1 = document.createAttributeNS("http://www.w3.org/XML/1998/namespace", "xml:lang");
-    attr1.value = "zh";
-    x2.setAttributeNode(attr1);
-    shouldBeEqualToString("localeOfNode('x2')", "zh");
-
-    x2.removeAttributeNode(attr1);
-    shouldBeEqualToString("localeOfNode('x2')", "ja");
-
-    // An attribute with local name "lang" not in the XML namespace should not affect locale.
-    var attr2 = document.createAttributeNS("foobar", "fb:lang");
-    attr2.value = "ph";
-    x2.setAttributeNode(attr2);
-    shouldBeEqualToString("localeOfNode('x2')", "ja");
-
     // If we include js-test-post.js directly, the "TEST COMPLETE" output comes out of order.
     wasPostTestScriptParsed = true;
     finishJSTest();