Remove "core: 8.x" from the .info.yml file

Hello Maintainers,
I have provided a patch for this issue.
To get more information visit https://www.drupal.org/node/3070687 →
Please review.

Thanks!

Adding both core and core_version_requirement with anything other than core_version_requirement: ^8 || ^9 will result in an exception.

For example, a module/theme that is compatible with Drupal 8 versions after Drupal 8.8.0 and also Drupal 9 will need to use the following line in its .info.yml file, without a line containing core.

core_version_requirement: ^8.8 || ^9

In the rare occasions the module/theme is also compatible with Drupal 10, its .info.yml file should use the following line.

core_version_requirement: ^8.8 || ^9 || ^10

@apaderno, I have updated MR Please review the commit 9aaf760d.

The MR is now correct.

Merged. Thanks for the contribution!

Automatically closed - issue fixed for 2 weeks with no activity.