Leverage defaults

Author: weswigham

src/compiler/transformers/es2015.ts

@@ -4137,7 +4137,7 @@ namespace ts {
             var __names = (this && this.__names) || (function() {
                 var name = Object.defineProperty ? (function(proto, name) {
                     Object.defineProperty(proto[name], 'name', { 
-                        value: name, configurable: true, writable: false, enumerable: false
+                        value: name, configurable: true
                     });
                 }) : (function(proto, name) {
                     proto[name].name = name;