Since no replies ...

... if you have done everything that is instructed in order to remove hyper-v functionality, maybe there is this principal Windows-thing preventing you. In Windows, in a general case, you can never be sure that you removed a program (which hyper-v also is). Removing something, is never the same as NOT installing it - or at the minimum, there is no practical way to be sure that it is the same.

The solution, how to REALLY remove it, might be modifying some registry entry or something equally simple. However, if you are unable to find it, is it possible to reinstall your server OS without hyper-v role (and all its dependencies that come with that)?

Also ... don't know what your actually problem or error message or error log is ... cannot find/deduct it from your post?