Reproduction steps:
1. Create a new project
2. Create any GameObject in the Hierarchy window
3. Make a Prefab with created GameObject
4. Delete the Prefab from the Project window and observe

Expected result: The Prefab is deleted without any artifacts left
Actual result: The Prefab name is left in the Project window

Reproducible with: 2022.1.0a4, 2022.1.0a6
Not reproducible with: 2019.4.29f1, 2020.3.16f1, 2021.1.17f1, 2021.2.0b9, 2022.1.0a3

Notes:
- When trying to delete the left artifact, a warning is thrown: "The operation "SoftDelete" cannot be executed because the selection is a root folder."
- When trying to drag the prefab artifact to another folder, an error is thrown: "Assertion failed on expression: 'm_hasValue'"
- Navigating to another folder and back to the folder where the prefab artifacts were, fixes the issue