Remove unused dependency

Author: typicode

package.json

@@ -19,7 +19,6 @@
     "morgan": "^1.3.1",
     "node-uuid": "^1.4.2",
     "serve-static": "^1.6.1",
-    "superagent": "^0.15.7",
     "underscore": "^1.5.2",
     "underscore-db": "^0.8.0",
     "underscore.inflections": "~0.2.1",