refactor: remove unused files

postcss.config.js

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

tailwind.config.js

@@ -1,10 +0,0 @@
-/** @type {import('tailwindcss').Config} */
-module.exports = {
-  content: [
-    './src/**/*.{js,ts,jsx,tsx}',
-  ],
-  theme: {
-    extend: {},
-  },
-  plugins: [],
-}