You can delete a block from the site completely from the block settings.

Deleting a block

For that, hover over the block, click on the three dots at the top right corner of the block and select Delete:

You can also delete the block from the Move blocks mode. To access it, hover over the needed block and click on the icon at the top right corner:

Then, delete the block by clicking on the bucket icon near it:

Click on cross icon at the top right corner to get back to the editor:

Don't forget to publish your site.

Tip: in case you will need a particular block in future, but don't want to show it on a published site, check the article Hiding a block on a page
Was this article helpful?
Thank you!