chore(deps): remove @react-aria/ssr package (#4350)

* chore(deps): remove @react-aria/ssr package

* docs: remove ssr docs

---------

Co-authored-by: Josh Black <[email protected]>

Author: joshblack

docs/content/ssr.mdx

@@ -94,7 +94,6 @@
     "@primer/live-region-element": "^0.2.0",
     "@primer/octicons-react": "^19.8.0",
     "@primer/primitives": "7.15.3",
-    "@react-aria/ssr": "^3.5.0",
     "@styled-system/css": "^5.1.5",
     "@styled-system/props": "^5.1.5",
     "@styled-system/theme-get": "^5.1.2",