Revert "Add missing admin action files and navigation links"

This reverts commit 41be6835bf.

src/app/admin/translations/cms/page.tsx

@@ -1,11 +0,0 @@
-import fs from 'node:fs/promises'
-import path from 'node:path'
-import { TranslationsClient } from '../translations-client'
-
-export default async function CmsTranslationsPage() {
-  const messagesDir = path.join(process.cwd(), 'messages')
-  const enContent = await fs.readFile(path.join(messagesDir, 'en.json'), 'utf-8')
-  const itContent = await fs.readFile(path.join(messagesDir, 'it.json'), 'utf-8')
-
-  return <TranslationsClient enJson={enContent} itJson={itContent} />
-}