Do not specify package manager

This breaks internal Meta setup because we run on a different yarn version

Author: cortinico

package.json

@@ -45,7 +45,6 @@
     "typescript": "^5.9.3",
     "typescript-eslint": "^8.57.1"
   },
-  "packageManager": "yarn@4.13.0",
   "resolutions": {
     "serialize-javascript": "^7.0.5",
     "serve-handler/minimatch": "3.1.4"