When a component is removed from instance and then the same component is removed from the prefab as well, the override window displays "No Overrides" with "Apply and Revert" options. Refer the attached video

Steps to reproduce:
1) Create a new project
2) In Hierarchy, Right Click > 3d Object > Cube
3) Drag to Project browser to make a prefab
4) In Hierarchy, Select Cube > Remove Box collider component
5) Open Cube in prefab mode> Remove Box collider component
6) Exit prefab mode > Select Cube > Overrides

Actual result: Override window displays "No Overrides" with "Apply and Revert" options

Expected Result: Overrides window should be empty

Occurring in: 2020.1.0a13, 2019.3.0b11, 2019.2.0f1, 2018.4.12f1

Environment: Both Windows and Mac