chore(client:ts): rm ts-helpers

Author: Awk34

templates/app/_package.json

@@ -126,8 +126,7 @@
     "gulp-babel": "^6.1.2",<% if(filters.ts) { %>
     "gulp-typescript": "~2.13.0",
     "gulp-typings": "^1.3.6",
-    "gulp-tslint": "^5.0.0",
-    "ts-helpers": "1.1.1",<% } %>
+    "gulp-tslint": "^5.0.0",<% } %>
     "gulp-env": "^0.4.0",
     "gulp-eslint": "^2.0.0",
     "gulp-imagemin": "^3.0.1",

templates/app/client/app/polyfills.js

@@ -2,11 +2,8 @@ import 'core-js/es6';
 import 'core-js/es7/reflect';
 import 'zone.js/dist/zone';
 
-<%_ if(filters.ts) { _%>
-// Typescript emit helpers polyfill
-  import 'ts-helpers';
-
-  interface IPolyFillErrorConstructor extends ErrorConstructor {
+<%_ if(filters.ts) { -%>
+interface IPolyFillErrorConstructor extends ErrorConstructor {
   stackTraceLimit: any;
 }<% } %>