removing empty XFAIL sections

ext/filter/tests/bug42718.phpt

@@ -15,7 +15,6 @@ echo ini_get('filter.default_flags') . "\n";
 var_dump(FILTER_FLAG_STRIP_LOW == 4);
 echo addcslashes($_GET['a'],"\0") . "\n";
 ?>
---XFAIL--
 --EXPECT--
 unsafe_raw
 4

ext/simplexml/tests/034.phpt

@@ -1,6 +1,5 @@
 --TEST--
 SimpleXML: array casting bug
---XFAIL--
 --SKIPIF--
 <?php if (!extension_loaded("simplexml")) print "skip"; ?>
 --FILE--