Removing unused dependencies and standard function syntax

package.json

@@ -65,8 +65,6 @@
     "coveralls": "^2.11.2",
     "dockerode": "^2.1.1",
     "exec": "0.2.0",
-    "fs-extra": "^0.17.0",
-    "fs-promise": "^0.3.1",
     "jquery": "^2.1.3",
     "mixpanel": "0.2.0",
     "node-uuid": "^1.4.3",

src/utils/SetupUtil.js

@@ -55,7 +55,7 @@ var SetupUtil = {
       return `installer -pkg ${util.escapePath(path.join(util.supportDir(), virtualBox.filename()))} -target /`;
     }
   },
-  macSudoCmd(cmd) {
+  macSudoCmd: function (cmd) {
     return `${util.escapePath(resources.macsudo())} -p "Kitematic requires administrative privileges to install." sh -c \"${cmd}\"`;
   },
   simulateProgress(estimateSeconds, progress) {