Unless there is a company mentioned on your deeds you have no obligation.
If it is an unadopted road there is likely to be a caveat which will make a provision for you to contribute to the upkeep of the road way or the services that are within it.
If they are taking over the management company, it will take quite a lot of effort on their part.
If you were asked for any money I would refuse unless the demand came via a solicitor.