cleaned up firebase init

src/boot/firebase.js

+import firebase from "firebase/app";
+import "firebase/auth";
+import "firebase/database";
+
 const firebaseConfig = function() {
   return {
     apiKey: process.env.FIREBASE_API_KEY,
@@ -9,12 +13,10 @@ const firebaseConfig = function() {
     appId: process.env.FIREBASE_APP_ID
   };
 };
-import firebase from "firebase/app";
-import "firebase/auth";
 
 export default async ({ Vue }) => {
   // console("Initialize firebase");
   Vue.prototype.$firebaseConfig = firebaseConfig();
-  const app = firebase.initializeApp(firebaseConfig());
+  firebase.initializeApp(firebaseConfig());
   Vue.prototype.$db = firebase.database();
 };