Unity 2018beta Package manager issue


Greeting unitytech, I found package manager, it will be very nice features if we can turnoff the builtin packages that we do not need, for example if i develop 3d on pc and colsoles, i Wouldn’t use 2d graphics, xr, AR, VR, 2d physics, facebook and web.
But when i try remove this i’ve got error.
What does it mean, and will you fix it?
Cannot perform upm operation: Package [com.unity.modules.vr] cannot be found in the project manifest [NotFound]
UnityEditor.EditorApplication:Internal_CallUpdateFunctions()

Hi Danua,
This is a known issue. Removing core packages currently doesn’t work. A fix for this bug is being reviewed and will hopefully land soon.