Removing unnecessary check since this is a private API

Author: Sean Willis

lib/http-proxy/common.js

@@ -4,8 +4,7 @@ var common   = exports,
     required = require('requires-port');
 
 var upgradeHeader = /(^|,)\s*upgrade\s*($|,)/i,
-    isSSL = /^https|wss/,
-    cookieProps = ['domain', 'path'];
+    isSSL = /^https|wss/;
 
 /**
  * Simple Regex for testing if protocol is https
@@ -212,9 +211,6 @@ common.urlJoin = function() {
  * @api private
  */
 common.rewriteCookieProperty = function rewriteCookieProperty(header, config, property) {
-  if(cookieProps.indexOf(property) === -1) //Property not supported
-    return header;
-
   if (Array.isArray(header)) {
     return header.map(function (headerElement) {
       return rewriteCookieProperty(headerElement, config, property);