Remove unused loaders of webpack (#3495)

config/webpack/loaders/babel.js

@@ -1,5 +1,5 @@
 module.exports = {
-  test: /\.js(\.erb)?$/,
+  test: /\.js$/,
   exclude: /node_modules/,
   loader: 'babel-loader',
   options: {

config/webpack/loaders/coffee.js

@@ -1,4 +0,0 @@
-module.exports = {
-  test: /\.coffee(\.erb)?$/,
-  loader: 'coffee-loader',
-};

config/webpack/loaders/erb.js

@@ -1,9 +0,0 @@
-module.exports = {
-  test: /\.erb$/,
-  enforce: 'pre',
-  exclude: /node_modules/,
-  loader: 'rails-erb-loader',
-  options: {
-    runner: 'bin/rails runner',
-  },
-};

config/webpack/paths.yml

@@ -8,11 +8,7 @@ default: &default
   node_modules: node_modules
   source: app/javascript
   extensions:
-    - .coffee
     - .js
-    - .jsx
-    - .ts
-    - .vue
     - .sass
     - .scss
     - .css