Remove deprecated props from Canvas block

[yannbf]

It's unclear whether to remove these deprecated properties from the Canvas block component in Storybook 8:

storybook/code/ui/blocks/src/blocks/Canvas.tsx

Line 24 in a756d2a

* @deprecated multiple stories are not supported

@JReinhold please let us know whenever you can 🙏

[shilman]

@JReinhold I think we should have a way to do docs-only stories before we remove this. I think I'm pretty close to having something here for 8.0 -- we just need to sit down and agree on some stuff. I can probably code it up in a day once we do. If we can't make that happen for some reason I suggest we punt on this until 9.0.

[JReinhold]

@shilman I guess your reason being that the new props only allow for a single story, meaning that users wanting multi-story canvases are left out? Unless we provide a way to write docs-only stories, which would be referencable by the Canvas block as a single story?

I can get behind that.

[shilman]

Exactly @JReinhold

[yannbf]

I'll leave it up to you @shilman, feel free to close this issue as unplanned if it won't work out!

[shilman]

I've implemented an approach to hiding stories from the sidebar #25328, and am confident we can get it into 8.0. Therefore we can move forward with this removal! 🚀