In Page Mode, workflows are applied on a page-by-page basis, so page has its own unique workflow template. Great for development, testing and training, but difficult to manage!
You'll need Space Admin privileges.
Remove all the templates from the Workflows tab ("Workflows Dashboard") – it should look like this:
On pages or blog posts:
There's also a repository of templates in Space Tools:
|Page Workflows||Confluence Admins can limit which spaces are allowed to use Page Mode.|