I don't think they have eliminated it for all the Med cruises this summer. We are going on the 12-night and I just got email from
DCL with Subject; Some Helpful Details Before You Sail!
Under Onboard party it said:
Magical stories will come to life at very special deck parties-filled with fun and surprises for everyone to enjoy. It's all hands on deck for Pirate Night with a party starring Mickey Mouse and his pals-and featuring a fireworks spectacular at sea! And don't miss the Freezing the Night Away With Anna, Elsa and Friends interactive show for a truly thrilling and chilling experience for everyone!
Under Formal Attire, it said:
Your voyage includes at least one formal evening. On these special nights, most women wear a gown or dress, and most men wear a jacket and tie. If you prefer a tuxedo, men's formalwear is available for rental during your cruise. In addition, If you'll be dining in one of our adults-only restaurants, we recommend a dress or pantsuit for women and a jacket and tie for men.
I had earlier checked with our TA and she replied "I checked with Disney and all nights are Casual except, night 2 is Formal, night 6 is Frozen Themed, night 10 is Pirate and night 11 is Semi Formal."