There was not a scene written for Lupin's death. We do not find out about it until later in the Hogwart's Great Hall. That was on page 661 of the American first edition.
As Ginny and Hermione moved closer to the rest of the family, Harry had a clear view of the bodies lying next to Fred: Remus and Tonks, pale and still and peaceful-looking, apparently asleep beneath the dark, enchanted ceiling. Excerpt from:
Harry Potter and the Deathly Hallows
Chapter 33: The Princes Tale
Page 661
ISBN 0545010221
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No. Remus Lupin's death is not seen, and neither is his wife Nymphadora's. Harry sees their bodies in the Great Hall.
Remus Lupin.
Fenrir Graybeck
Yes. He was killed by Dolohov during the final battle at Hogwarts.
Remus Lupin, werewolf, teacher of Defense Against the Dark Arts in year 3, and member of the Order of the Phoenix (i.e., supporter of Dumbledore and the anti-Voldemort movement).