Remove extra trailing commas

lib/build/files/webpack_files.js

@@ -3,7 +3,7 @@ var files = {
     page: 'dashboard',
     stylesheets: [
       '/stylesheets/common_new.css',
-      '/stylesheets/dashboard.css',
+      '/stylesheets/dashboard.css'
     ],
     scripts: [
       '/javascripts/common.js',
@@ -27,7 +27,7 @@ var files = {
   profile: {
     page: 'profile',
     stylesheets: [
-      '/stylesheets/common_new.css',
+      '/stylesheets/common_new.css'
     ],
     scripts: [
       '/javascripts/common.js',