Delete the 9.x branch and its associated release

So when we start developing Drupal 9 we'd:

1. Create a new branch called 9.0.x from whatever Drupal 8.x.x branch we're up to.
2. Create a new branch from 9.x called 10.x and update the readme?
3. Maybe do a force push to delete the 9.x branch?

git ls-files -z | xargs -0 git rm works better if the working copy has any untracked files.

Re #2 why 10.x not 10.0.x?

@cilefen because if we make the placeholder branch 10.0.x then we have to force delete it when in comes time to branch 9.x.x to open the 10.0.x branch - which messes with git history.

Oh, exactly, I get it now.

I wonder if removing all files from the branch and then pushing them again at some point will have much impact on overall size of the repository.

This shouldn't have much of an effect on repository size, compared to the size it already is.

I would say this needs to be done pretty much immediately, as I myself have just installed using the 9.x branch and was confused as to why 9.x looks more like 7.x than 8.x does and why it has so much functionality missing.

At what point will we have a working 9.0.x dev branch? I'm quite enthusiastic to contribute to be honest.

The mind also boggled at why that disgusting 'Overlay' module was back.

Urrrgh.

@djalxs I am glad you are enthusiastic. There is much still to innovate in Drupal 8—please help there. I understand the confusion to a degree, however, I am not aware of anything on drupal.org indicating that development on Drupal 9 has begun. Some related reading:

• http://buytaert.net/making-drupal-upgrades-easy-forever
• https://www.drupal.org/core/release-cycle-overview

#3087223: Bulk update 8.7.x & 8.8.x Drupal core issues for 8.9.x AND 9.0.x! migrated all the 9.x issues to 9.0.x. I don't believe there is anything else left to postpone this on? I will not do the branch removal myself though to make sure to check with all respective parties that it is a go!

People are getting confused, such as

What is the difference between #Drupal 9.x & 9.0.x branch?
Wondering which is the active development branch atm.

Thanks :)

— जयदीप सिंह कण्डारी (@JayKandari) October 22, 2019

Also there is apparently no 9.x tarball / release anymore, just the branch.

I deleted the release shortly after issue migration, so no issues got back to the 9.x version.

Go ahead and push deletion of the 9.x branch whenever you’d like, or let me know if I should take care of that.