No mini css extract plugin for SSR

Author: ajones513

packages/react-scripts/config/webpack.config.ssr.js

@@ -102,13 +102,6 @@ module.exports = function(webpackEnv) {
     preProcessorOptions = {}
   ) => {
     const loaders = [
-      isEnvProduction && {
-        loader: MiniCssExtractPlugin.loader,
-        options: Object.assign(
-          {},
-          shouldUseRelativeAssetPaths ? { publicPath: '../../' } : undefined
-        ),
-      },
       {
         loader: require.resolve('css-loader/locals'),
         options: cssOptions,
@@ -683,14 +676,6 @@ module.exports = function(webpackEnv) {
       // See https://github.com/facebook/create-react-app/issues/186
       isEnvDevelopment &&
         new WatchMissingNodeModulesPlugin(paths.appNodeModules),
-      isEnvProduction &&
-        new MiniCssExtractPlugin({
-          // Options similar to the same options in webpackOptions.output
-          // both options are optional
-          // filename: 'static/css/[name].[contenthash:8].css',
-          filename: 'ssr.css',
-          // chunkFilename: 'static/css/[name].[contenthash:8].chunk.css',
-        }),
       // Generate a manifest file which contains a mapping of all asset filenames
       // to their corresponding output file so that tools can pick it up without
       // having to parse `index.html`.