Remove styles from js

build/webpack-test.mix.js

@@ -3,4 +3,5 @@ const mix = require('laravel-mix');
 mix
     .setPublicPath('test/js/dist')
     .js('test/js/src/index.js', 'index.js')
-    .sourceMaps();
+    .sass('test/js/src/index.scss', 'index.css')
+    .sourceMaps();

build/webpack.mix.js

@@ -5,6 +5,7 @@ const inProduction = mix.inProduction();
 mix
     .setPublicPath('dist')
     .js('src/js/index.js', 'js/vue-context.js')
+    .sass('src/sass/vue-context.scss', 'css/vue-context.css')
     .sourceMaps(! inProduction)
     .webpackConfig({
         output: {