From what I have been told by Lutherans, the WELS (third largest group after ELCA and LCMS) is considered a bit radical. I believe they also dropped James from the NT (or some other such book that Luther didn’t like but left in).
I would say this is a very accurate statement of belief for the WELS but not Lutherans in General.
I would suspect the “open question” theory would be how it is treated among some of the more traditionally minded Lutherans.
As a WELS member, I can you tell 100% that statement is false. We have not dropped any books from the NT.