I found that
If you put the block ID for xxxxx, you can delete them
[url]http://www.your-cs-cart/admin.php?dispatch=block_manager.delete&selected_section=products&block_id=xxxxx[/url]
But if I want it works, not hide. I don’t know how to do because when I use the trick as above, I can edit that block but the error one and it doesn’t display in block section
[url]http://www.your-cs-cart/admin.php?dispatch=block_manager.update&block_id=xxxxx&location=products&position=central[/url]
xxxxx=ID of block you want to edit or delete