While Powershell 2.0 compatibility can be removed via add/remove Windows components, Powershell 5.0 is integral to Windows 10. I've searched for solutions, and it doesn't seem that it can be removed.
Uh yes it can be, use NTLite. It can remove more than just Powershell... hxxp://www.ntlite.com
Having done some looking into NTLite, it does seem to be able to remove Powershell functionality (no idea whether a system is stable this way, as it's generally described as a core element of the operating system these days).
However, with Microsoft replacing the command prompt with Powers