Steps to reproduce:

1. In any Project create a "Panel Settings Asset" (Create > UI Toolkit > Panel Settings Asset) and select it
2. Set the Render Mode to "World Space"
3. Create or just open any Prefab and add a "UI Document" Component to any GameObject
4. Assign the World Space configured Panel Settings Asset to that UI Document Component
5. Enter Play Mode and remove the UI Document Component and exit Play Mode
6. Exit out of Prefab View and open up the Prefab again
7. Observe the Inspector of the GameObject inside a Prefab

Actual results: A "UI Renderer" Component is leftover from deleting the World Space configured UI Document Component

Expected results: No leftover Component is present

Reproducible with versions: 6000.2.0b4

Not reproducible with versions: 2022.3.63f1, 6000.0.50f1, 6000.1.6f1 (No World Space UI)

Tested on (OS): Windows 11