fix: Remove postcss after upgrading to Tailwind 4

Author: LubomirGeorgiev

package.json

@@ -80,7 +80,7 @@
     "@eslint/eslintrc": "^3",
     "@next/bundle-analyzer": "^15.5.6",
     "@simplewebauthn/types": "^12.0.0",
-    "@tailwindcss/postcss": "^4.1.7",
+    "@tailwindcss/postcss": "^4",
     "@tailwindcss/typography": "^0.5.19",
     "@types/ms": "^0.7.34",
     "@types/node": "^20.19.21",
@@ -89,7 +89,6 @@
     "drizzle-kit": "^0.31.5",
     "eslint": "^9",
     "eslint-config-next": "15.4.6",
-    "postcss": "^8",
     "react-email": "3.0.6",
     "tailwindcss": "^4.1.14",
     "tw-animate-css": "^1.4.0",