It's visible to the uploader only, so yes it's still there.
"Developers: If you’re using the YouTube API for dislikes, you will no longer have access to public dislike data beginning on December 13th. Your end users will still be able to view dislike data related to their own content on authenticated API requests. You can apply for an exemption (to have dislike data on non-authenticated calls) as long as you don’t display or share dislike data with your end users."
of course you can still see your OWN dislike but not the overall ratio, but the uploader can see that. what's your point exactly