Revert PR #436

Using Statiq processes for tailwind commands

This reverts commit adb600c430.
This reverts commit ab83e41051.

docs/input/postcss.config.js

@@ -1,6 +0,0 @@
-module.exports = {
-  plugins: {
-    tailwindcss: {},
-    autoprefixer: {},
-  },
-}