Fix conding style errors (unused vars, quotes)

build/webpack.base.config.js

 const path = require('path')
-const webpack = require('webpack')
 const vueConfig = require('./vue-loader.config')
 
 module.exports = {

build/webpack.client.config.js

@@ -26,8 +26,8 @@ if (process.env.NODE_ENV === 'production') {
   // so they are extracted.
   vueConfig.loaders = {
     stylus: ExtractTextPlugin.extract({
-      loader: "css-loader!stylus-loader",
-      fallbackLoader: "vue-style-loader" // <- this is a dep of vue-loader
+      loader: 'css-loader!stylus-loader',
+      fallbackLoader: 'vue-style-loader' // <- this is a dep of vue-loader
     })
   }
 

src/store/index.js

 import Vue from 'vue'
 import Vuex from 'vuex'
-import { fetchItem, fetchItems, fetchIdsByType, fetchUser } from './api'
+import { fetchItems, fetchIdsByType, fetchUser } from './api'
 
 Vue.use(Vuex)