Many times I've found myself becoming irritated that the
"Create" option in the Umbraco UI context menu, is there even when
there aren't any allowed child nodes under that node. When I click
it, all I get is an empty dialog. Here's how you get rid of it.

Please, do note, this solution isn't for everyone. There might
be a special case when you'd want that empty dialog. I don't know
when or why, but it might happen. Also, you might ask why I keep
putting code samples in images. It's because I want you to actually
read what you are putting into your own source, and not just copy
and paste. Copy and paste isn't a very good practice you know.