Remove welcome page.

Author: Robert Jackson

package.json

@@ -37,7 +37,6 @@
     "ember-export-application-global": "^1.0.5",
     "ember-load-initializers": "^0.6.3",
     "ember-resolver": "^3.0.0",
-    "ember-welcome-page": "^1.0.3",
     "loader.js": "^4.0.10"
   },
   "keywords": [