remove unused dep

Author: icebob

package.json

@@ -62,7 +62,6 @@
     "extract-text-webpack-plugin": "1.0.1",
     "fakerator": "0.3.0",
     "fecha": "2.3.0",
-    "gitbook-cli": "2.3.0",
     "inject-loader": "2.0.1",
     "isparta-loader": "2.0.0",
     "jade": "1.11.0",