Removed unused dependency

Author: robneu

package.json

@@ -42,7 +42,6 @@
     "grunt-webfont": "~0.5",
     "grunt-wp-css": "~0.2",
     "grunt-wp-i18n": "~0.5",
-    "load-grunt-config": "~0.17",
     "node-neat": "~1.7",
     "time-grunt": "~1.2"
   }