Minor refactoring around theme access

scripts/webpack/webpack.test.js

@@ -1,38 +0,0 @@
-const webpack = require('webpack');
-const merge = require('webpack-merge');
-const common = require('./webpack.common.js');
-
-config = merge(common, {
-  mode: 'development',
-  devtool: 'cheap-module-source-map',
-
-  externals: {
-    'react/addons': true,
-    'react/lib/ExecutionEnvironment': true,
-    'react/lib/ReactContext': true,
-  },
-
-  module: {
-    rules: [
-      {
-        test: /\.tsx?$/,
-        exclude: /node_modules/,
-        use: {
-          loader: 'ts-loader',
-          options: {
-            transpileOnly: true,
-          },
-        },
-      },
-    ],
-  },
-
-  plugins: [
-    new webpack.SourceMapDevToolPlugin({
-      filename: null, // if no value is provided the sourcemap is inlined
-      test: /\.(ts|js)($|\?)/i, // process .js and .ts files only
-    }),
-  ],
-});
-
-module.exports = config;