Fix eslint errors

package.json

@@ -46,8 +46,6 @@
     "electron-builder": "^7.11.2",
     "electron-connect": "~0.6.0",
     "electron-prebuilt": "1.4.2",
-    "esformatter": "^0.9.6",
-    "esformatter-jsx": "^7.0.1",
     "eslint": "^3.4.0",
     "eslint-plugin-react": "^6.2.0",
     "gulp": "^3.9.1",
@@ -58,7 +56,6 @@
     "mocha": "^3.0.2",
     "mocha-circleci-reporter": "0.0.2",
     "spectron": "~3.4.0",
-    "through2": "^2.0.1",
     "webpack": "^1.13.1",
     "webpack-merge": "^0.14.1"
   },