[Flight Parcel] Remove private package (facebook#31746)

We'll start publishing these.

Author: sebmarkbage

packages/react-server-dom-parcel/package.json

@@ -2,7 +2,6 @@
   "name": "react-server-dom-parcel",
   "description": "React Server Components bindings for DOM using Parcel. This is intended to be integrated into meta-frameworks. It is not intended to be imported directly.",
   "version": "19.0.0",
-  "private": true,
   "keywords": [
     "react"
   ],