Simplify razzle config

razzle.config.js

@@ -13,53 +13,4 @@ Object.keys(pathsConfig).forEach((pkg) => {
   }
 });
 
-if (process.env.NODE_ENV === 'production') {
-  module.exports = require(`${voltoPath}/razzle.config`);
-} else {
-  const HardSourceWebpackPlugin = require('hard-source-webpack-plugin');
-
-  let voltoConfig = require(`${voltoPath}/razzle.config`);
-
-  module.exports = {
-    ...voltoConfig,
-    modifyWebpackConfig: (opts) => {
-      const vc = voltoConfig.modifyWebpackConfig(opts);
-      const hardSource = new HardSourceWebpackPlugin({
-        // Either an absolute path or relative to webpack's options.context.
-        cacheDirectory: 'node_modules/.cache/hard-source/[confighash]',
-        // Either a string of object hash function given a webpack config.
-        configHash: function (webpackConfig) {
-          // node-object-hash on npm can be used to build this.
-          return require('node-object-hash')({ sort: false }).hash(
-            webpackConfig,
-          );
-        },
-        // Either false, a string, an object, or a project hashing function.
-        environmentHash: {
-          root: process.cwd(),
-          directories: [],
-          files: ['package-lock.json', 'yarn.lock'],
-        },
-        // An object.
-        info: {
-          // 'none' or 'test'.
-          mode: 'none',
-          // 'debug', 'log', 'info', 'warn', or 'error'.
-          level: 'debug',
-        },
-        // Clean up large, old caches automatically.
-        cachePrune: {
-          // Caches younger than `maxAge` are not considered for deletion. They must
-          // be at least this (default: 2 days) old in milliseconds.
-          maxAge: 2 * 24 * 60 * 60 * 1000,
-          // All caches together must be larger than `sizeThreshold` before any
-          // caches will be deleted. Together they must be at least this
-          // (default: 50 MB) big in bytes.
-          sizeThreshold: 50 * 1024 * 1024,
-        },
-      });
-      vc.plugins.push(hardSource);
-      return vc;
-    },
-  };
-}
+module.exports = require(`${voltoPath}/razzle.config`);