You're right, the degree was removed in 1967, because Kelvin's units are considered absolute. However, one could argue that, since it has a scale, each "step" or "unit" can be considered a "degree", like in a literal scale. In informal conversation, we should not be so pedantic. Even some modern scientific textbooks still include the degree.
Indeed. Nobody’s going to be confused by “degrees Kelvin.”
> the degree was removed in 1967
I did not know that. I've always thought it was originally defined as units Kelvin, without degree.