chore(greenkeeper): remove greenkeeper config from package.json

Author: christopherthielen

package.json

@@ -94,17 +94,5 @@
     "webpack": "^3.11.0",
     "webpack-dev-server": "^3.1.1",
     "zone.js": "^0.8.20"
-  },
-  "greenkeeper": {
-    "ignore": [
-      "@angular/common",
-      "@angular/compiler",
-      "@angular/compiler-cli",
-      "@angular/core",
-      "@angular/platform-browser",
-      "@angular/platform-browser-dynamic",
-      "@angular/platform-server",
-      "@angular/router"
-    ]
   }
 }