MS-904 Remove unsupported language files

[luhmirin-s]

JIRA ticket
Will be released in: 2025.2.0

Notable changes

• Removed translation files for languages that are not supported in Vulcan and Transifex anymore.

Additional work checklist

• Effect on other features and security has been considered
• Design document marked as "In development" (if applicable)
• External (Gitbook) and internal (Confluence) Documentation is up to date (or ticket created)
• Test cases in Testiny are up to date (or ticket created)
• Other teams notified about the changes (if applicable)