removed rogue line, fixed typo in unit test name

Author: Pomax

processing.js

@@ -5378,7 +5378,6 @@ module.exports = function(options, undef) {
     parse: function(textstring, stringIsURI) {
       var xmlDoc;
       try {
-        var extension = textstring.substring(textstring.length-4);
         if (stringIsURI) {
           textstring = ajax(textstring);
         }