change controller file name to plural

app/controllers/cities.js

@@ -1,5 +1,4 @@
-const db = require('../models/index');
-const  { currentRERequest } = require('../helpers/url'); 
+const  { currentRERequest } = require('../helpers/url');
 const { regions } = require('../helpers/codes');
 
 const cities = regions();
@@ -7,9 +6,9 @@ const cities = regions();
 
 const getCity = (req,res) => {
   const nextStep = req.query.nextStep || '/';
-  res.render('city', { 
-         nextStep, 
-         cities  
+  res.render('city', {
+         nextStep,
+         cities
   });
 }
 
@@ -21,7 +20,7 @@ const postCity = async (req, res) => {
   res.redirect(nextStep)
 }
 
-module.exports = { 
+module.exports = {
   getCity,
   postCity
 };