Moderation report for Working with Custom Blocks

I am reporting to moderators because:

It needs to be deleted, given that it is an almost perfect duplicate of in the Drupal core module section.

Also, the ‘Custom Block’ module is not a contrib module, but rather a D8 core module,
so this page in the ‘contrig’ section is the one page of the two pages that should disappear.

Thank you kindly for you attention to this matter.