*Steps to reproduce:*
# Create a new URP project.
# Assets > Create > UI Toolkit > UI Document, open this in UI Builder.
# Note under Library, in the "Standard" tab, there are Tab and Tab View controls available.
# Under Library, click "Project".

*Actual results:* Custom controls TabbedView and TabButton exist here.
It is confusing that it is in the Project view by default, as I didn't create these as a user. I also can't find documentation for them.

*Expected results:* There should be some existing documentation on these Custom Controls, or they shouldn't be included by default as they seem to duplicate existing Library Controls.

*Reproducible with versions:*
* 6000.1.0a6, 6000.0.29f1
* 2022.3.52f1, 2021.3.45f1, but Tab and Tab View are not available controls in these versions so perhaps these make more sense here.

*Tested on (OS):* MacOS Monterey 12.7.4

*Notes:*
* I looked for some documentation on these components, but could not find anything. I did find a thread expressing confusion over these components [https://discussions.unity.com/t/how-do-i-even-use-this-tabbutton-and-tabbedview/913059]
and felt the same way about them.