How to remove Facebook SDK from project when I don't need that?

Created a new project called No Facebook and removed the FacebookSDK from Library folder .alt text
Note this FacebookSDK folder is always there as in the image
Look what I get:

 error CS0006: Metadata file `Library/FacebookSDK/Facebook.Unity.Settings.dll' could not be found

This is an error message.
Problem is I don’t need any Facebook support in my app at the moment.

Any tips to remove Facebook? I tested this for Android APK.
(But the same problem is also for standalone).

If I close and start the project again, the FaceboookSDK folder is back.
Strange.

I Found the same issue.Did u find the answer??