chore(package.json): Remove the deprecated licenses field

The "licenses" field is deprecated in favor of the "license" field... which
we already have specified.

Author: mgol

package.json

@@ -86,12 +86,6 @@
     "stringmap": "^0.2.2",
     "strip-json-comments": "^2.0.1"
   },
-  "licenses": [
-    {
-      "type": "MIT",
-      "url": "https://github.com/angular/angular.js/blob/master/LICENSE"
-    }
-  ],
   "dependencies": {},
   "config": {
     "commitizen": {