remove unused codemirror theme

Author: tsnobip

package.json

@@ -33,7 +33,6 @@
     "@codemirror/lint": "^6.9.0",
     "@codemirror/search": "^6.5.11",
     "@codemirror/state": "^6.5.2",
-    "@codemirror/theme-one-dark": "^6.1.3",
     "@codemirror/view": "^6.38.5",
     "@docsearch/react": "^4.3.1",
     "@headlessui/react": "^2.2.4",