chore: remove unified in devDependencies.

Author: jaywcjlove

package.json

@@ -71,8 +71,7 @@
     "react-test-renderer": "17.0.2",
     "rehype": "11.0.0",
     "rehype-parse": "7.0.1",
-    "tsbb": "2.2.1",
-    "unified": "9.2.1"
+    "tsbb": "2.2.1"
   },
   "eslintConfig": {
     "extends": [