remove postcss-flexbugs-fixes luisrudge/postcss-flexbugs-fixes#36

Author: zangrafx

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

@@ -266,7 +266,6 @@ module.exports = {
                 // https://github.com/facebookincubator/create-react-app/issues/2677
                 ident: 'postcss',
                 plugins: () => [
-                  require('postcss-flexbugs-fixes'),
                   autoprefixer({
                     browsers: [
                       '>1%',

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

@@ -238,7 +238,6 @@ module.exports = {
                     // https://github.com/facebookincubator/create-react-app/issues/2677
                     ident: 'postcss',
                     plugins: () => [
-                      require('postcss-flexbugs-fixes'),
                       autoprefixer({
                         browsers: [
                           '>1%',