Remove private from s2 so we can get nightlies (#6849)

Author: LFDanLu

packages/@react-spectrum/s2/package.json

@@ -3,7 +3,6 @@
   "version": "0.2.0",
   "description": "Spectrum 2 UI components in React",
   "license": "Apache-2.0",
-  "private": true,
   "repository": {
     "type": "git",
     "url": "https://github.com/adobe/react-spectrum"