How to delete a hide tab of DotNetNuke?

Today I encountered a problem.
I have created a hide tab which has no reference anywhere else in the site.
Later the tab I think is out of use and I decide to delete it.
But I can't find somewhere to execute the action.

Here is my solution:

1. Setup a reference to the hide tab. For example set the user tab to refer to the hide tab in Site Settings.
2. Go to the hide tab and get its tab id.
3. Delete the reference to the tab.
4. Go to the tab directly by the tab id.
5. Go to the tab edit page and delete it.