chore: 🔥 Remove react-old (@digdir/design-system-react) (#2200)

Remove deprecated package as its interfering with changesets, upgrades
and builds now.

Made a separate branch
[react-old](https://github.com/digdir/designsystemet/tree/react-old) to
keep archive.

Author: mimarz

.changeset/config.json

@@ -16,7 +16,6 @@
     "storefront",
     "@repo/components",
     "@designsystemet/storybook",
-    "@digdir/design-system-react",
     "figma-plugin",
     "@digdir/create-tokens"
   ]

.changeset/pre.json

@@ -10,7 +10,6 @@
     "@digdir/create-tokens": "0.1.0-alpha.7",
     "@digdir/designsystemet-css": "0.11.0-alpha.9",
     "@digdir/designsystemet-react": "1.0.0-rc.13",
-    "@digdir/design-system-react": "0.54.0",
     "@digdir/designsystemet-theme": "1.0.0-rc.13",
     "figma-plugin": "0.1.0",
     "@designsystemet/storybook": "0.1.0"

biome.jsonc

@@ -14,8 +14,7 @@
       "tsc-build/**",
       "design-tokens/**/*",
       "packages/theme/brand/**/*",
-      "apps/storefront/tokens/**",
-      "packages/react-old/**/*"
+      "apps/storefront/tokens/**"
     ]
   },
   "formatter": {