refactor(@angular/cli): cleanup unused dependencies

Author: clydin

package-lock.json

@@ -142,8 +142,7 @@
     "temp": "0.8.3",
     "through": "^2.3.6",
     "ts-node": "^3.2.0",
-    "tslint": "^5.1.0",
-    "walk-sync": "^0.3.1"
+    "tslint": "^5.1.0"
   },
   "optionalDependencies": {
     "node-sass": "^4.3.0"

package.json

@@ -1,7 +1,3 @@
-// Prevent the dependency validation from tripping because we don't import these. We need
-// it as a peer dependency of @angular/core.
-// require('zone.js')
-
 import * as path from 'path';
 
 const cli = require('../../ember-cli/lib/cli');