Removing the notebook concat text document API proposal

[mjbvz]

The Notebook Concat Text Document api is not currently on track for finalization. Instead of having this functionality as part of VS Code core, we believe that individual extensions/languages are better equipped to build their own virtual document model of notebooks (in cases where such a model makes sense)

We plan to remove this proposed API once all current consumers have migrated off of it. The only known consumers today are:

• Jupyter @DonJayamanne
• Dot Net Interactive @brettfo, @colombod Migrate off of the concat text document API proposal dotnet/interactive#1966

Please let me know if you are still consuming this API and if there are any blockers that would prevent migrating off of it

[DonJayamanne]

Please let me know if you are still consuming this API and if there are any blockers that would prevent migrating off of it

Yes. we're still consuming this API.
@rchiodo Please could you update @mjbvz on the status of migrating away from this (I believe Pylance needs to adopt notebook support. But we'd still need this for Jedi)

[rchiodo]

Actually I don't think we need this anymore as we have our own version: https://github.com/microsoft/lsp-notebook-concat

We can just remove this from our list of proposed APIs.

[DonJayamanne]

We can just remove this from our list of proposed APIs.

I don't think we can. lets discuss.

[DonJayamanne]

@mjbvz confirmed, we can remove Jupyter from that list, we'll update our package.json accordingly.

[mjbvz]

Thanks @DonJayamanne and @rchiodo! Removing from product.json for the next insiders

cc @jrieken

[mjbvz]

Confirmed the Dot Net Interactive does not use this API so we can safely delete it. I'll update the api enablement list and then look into deleting the api entirely