remove accidentally-commited changes

spec/package.json

@@ -10,7 +10,6 @@
     "chai-as-promised": "^7.1.1",
     "coffee-script": "1.12.7",
     "dbus-native": "^0.2.3",
-    "fs-extra": "^6.0.0",
     "graceful-fs": "^4.1.9",
     "mkdirp": "^0.5.1",
     "mocha": "^3.1.0",