package: remove unused package

package.json

@@ -71,7 +71,6 @@
     "jiti": "^2.4.2",
     "playwright": "^1.53.1",
     "prettier": "^3.6.0",
-    "tree-kill": "^1.2.2",
     "typescript": "^5.8.3",
     "typescript-eslint": "^8.35.0",
     "vite": "^6.3.5",