The latest LEGO packaging for the Boba Fett spaceship set no longer refers to the craft as Slave I but rather "Boba Fett's Starship." (As seen in the screenshot above, it's still called Slave I on StarWars.com, for the moment anyway.) Jens Kronvold Frederiksen (LEGO Star Wars Design Director) and Michael Lee Stockwell (LEGO Star Wars Lead Designer) told Jedi News that's at the direction of Disney.
Michael: We're not calling it Slave I any more. This is Boba Fett's Starship.
James: OK, why are we dropping the Slave I name?
Jens: Everybody is. It's probably not something which has been announced publicly but it is just something that Disney doesn't want to use any more.
One of the actors who played Boba Fett is apparently very angry at the decision. To be clear, this particular actor—Mark Austin—only appeared in the Boba Fett suit once, verrrry briefly, when the character was added in to the 1997 Special Edition of Star Wars: Episode IV – A New Hope.
And he's gone on and on from there…
(Thanks, Bob Pescovitz!)