Founder doesn't have additional rights, so no, they can't remove bureaucrat right.
A community discussion is required to demote a bureaucrat (just like admins). That must be in a blog or discussion post. If more people agree than not, then contact Fandom Staff and include the link the blog post or discussion. That's when the Bureaucrat right will be removed.
Bureaucrats will generally be demoted only if there is a full community agreement to do so, or they've been inactive for a year. Whether they do it upon a founder's request depends entirely upon the situation.