Revert "fix css nano preset"

This reverts commit 94aab5a.

Author: sprocketc

postcss.config.js

@@ -1,10 +1,10 @@
 module.exports = {
-  plugins: {
-    'autoprefixer': {},
-    'postcss-import-ext-glob': {},
-    'postcss-import': {},
-    'tailwindcss/nesting': 'postcss-nested',
-    'tailwindcss': {},
-    'cssnano': { preset: 'default' }
-  }
-}
+    plugins: {
+      'autoprefixer': {},
+      'postcss-import-ext-glob': {},
+      'postcss-import': {},
+      'tailwindcss/nesting': 'postcss-nested',
+      'tailwindcss': {},
+      'cssnano': process.env.NODE_ENV == 'production' ? {} : false
+    }
+  }