Remove XPathException

LayoutTests/fast/dom/DOMException/XPathException-expected.txt

-Tests the properties of the XPathException object.
+Tests the properties of the exception thrown when using XPath.
 
 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
 
 
-PASS e.toString() is "TYPE_ERR: The expression could not be converted to return the specified type."
-PASS Object.prototype.toString.call(e) is "[object XPathException]"
-FAIL Object.prototype.toString.call(e.__proto__) should be [object XPathExceptionPrototype]. Was [object Object].
-PASS e.constructor.toString() is "function XPathException() { [native code] }"
-PASS e.constructor is window.XPathException
-PASS e.TYPE_ERR is e.constructor.TYPE_ERR
-PASS e.INVALID_EXPRESSION_ERR is 51
-PASS e.TYPE_ERR is 52
+PASS e.toString() is "TypeError: Type error"
+PASS Object.prototype.toString.call(e) is "[object Error]"
+PASS Object.prototype.toString.call(e.__proto__) is "[object Error]"
+PASS e.constructor.toString() is "function TypeError() { [native code] }"
+PASS e.constructor is window.TypeError
 PASS successfullyParsed is true
 
 TEST COMPLETE