chore(package.json): remove postupdate hook

We would want more control over when bower updates are run.

Author: petebacondarwin

package.json

@@ -14,7 +14,6 @@
   },
   "scripts": {
     "postinstall": "bower install",
-    "postupdate": "bower update",
 
     "start": "http-server -p 8000",
     "test": "karma start test/karma.conf.js --single-run",