remove unused deps

Author: marcoacierno

backend/custom_admin/package.json

@@ -35,11 +35,9 @@
     "@types/react-dom": "^19.0.2",
     "astro": "^5.0.5",
     "clsx": "^2.1.1",
-    "fabric": "^6.5.3",
     "fast-deep-equal": "^3.1.3",
     "graphql": "^16.10.0",
     "lucide-react": "^0.468.0",
-    "pdfjs-dist": "^4.9.155",
     "react": "^19.0.0",
     "react-dnd": "^16.0.1",
     "react-dnd-html5-backend": "^16.0.1",