cleanup(deps): Remove node-sass

Because:

* Seems unused and not compatible with Node 22

This commit:

* Remove from content-server dependencies

Closes #

Author: vpomerleau

packages/fxa-content-server/package.json

@@ -111,7 +111,6 @@
     "morgan": "^1.10.0",
     "mozlog": "^3.0.2",
     "mustache": "4.2.0",
-    "node-sass": "^9.0.0",
     "node-uuid": "1.4.8",
     "node-vat": "0.0.9",
     "normalize.css": "8.0.1",