chore: Clean up unused files, imports, and work on getting end-to-end tests and unit tests running (#2272)

.webpack/rules/stylusToJavaScript.js

@@ -1,10 +0,0 @@
-const stylusToJavaScript = {
-  test: /\.styl$/,
-  use: [
-    { loader: 'style-loader' }, // 3. Style nodes from JS Strings
-    { loader: 'css-loader' }, // 2. CSS to CommonJS
-    { loader: 'stylus-loader' }, // 1. Stylus to CSS
-  ],
-};
-
-module.exports = stylusToJavaScript;

.webpack/webpack.base.js

@@ -14,6 +14,7 @@ const TerserJSPlugin = require('terser-webpack-plugin');
 const NODE_ENV = process.env.NODE_ENV;
 const QUICK_BUILD = process.env.QUICK_BUILD;
 const BUILD_NUM = process.env.CIRCLE_BUILD_NUM || '0';
+const { UnusedFilesWebpackPlugin } = require("unused-files-webpack-plugin");
 
 //
 dotenv.config();
@@ -99,6 +100,18 @@ module.exports = (env, argv, { SRC_DIR, DIST_DIR }) => {
           process.env.LOCIZE_API_KEY || ''
         ),
       }),
+      new UnusedFilesWebpackPlugin({
+        failOnUnused: true,
+        globOptions: {
+          ignore: [
+            "node_modules/**/*",
+            "index.umd.js",
+            "sanity.test.js",
+            "__mocks__/fileMock.js",
+            "__tests__/globalSetup.js"
+          ]
+        }
+      }),
     ],
     // Fix: https://github.com/webpack-contrib/css-loader/issues/447#issuecomment-285598881
     // For issue in cornerstone-wado-image-loader

.webpack/webpack.commonjs.js

@@ -1,19 +0,0 @@
-const merge = require('webpack-merge');
-const webpackBase = require('./webpack.base.js');
-const cssToJavaScriptRule = require('./rules/cssToJavaScript.js');
-const stylusToJavaScriptRule = require('./rules/stylusToJavaScript.js');
-
-/**
- * WebPack configuration for CommonJS Bundles. Extends rules of BaseConfig by making
- * sure we're bundling styles and other files that would normally be split in a
- * PWA.
- */
-module.exports = (env, argv, { SRC_DIR, DIST_DIR }) => {
-  const baseConfig = webpackBase(env, argv, { SRC_DIR, DIST_DIR });
-
-  return merge(baseConfig, {
-    module: {
-      rules: [cssToJavaScriptRule, stylusToJavaScriptRule],
-    },
-  });
-};