remove old angular2 package

Author: jelbourn

package.json

@@ -25,8 +25,6 @@
     "node": ">= 4.2.1 < 5"
   },
   "dependencies": {
-    "angular2": "2.0.0-beta.17",
-
     "@angular/common": "0.0.0-5",
     "@angular/compiler": "0.0.0-5",
     "@angular/core": "0.0.0-5",