I'm also disappointed by that one. Though I rank some removed titles higher, I better understand their removal.
Here's who's left.
Alien
An American Werewolf in London
The Bride of Frankenstein
The Cabinet of Dr. Caligari
Carrie (1976)
Cat People (1942)
Dawn of the Dead (1978)
Don't Look Now
Dracula (1931)
The Evil Dead (1981)
Evil Dead 2
The Exorcist
Eyes Without a Face
The Fly (1986)
Frankenstein (1931)
Halloween (1978)
The Haunting (1963)
Hellraiser
The Innocents
Invasion of the Body Snatchers (1956)
Jaws
Night of the Living Dead (1968)
A Nightmare on Elm Street (1984)
Nosferatu (1922)
The Omen (1976)
Peeping Tom
The Phantom of the Opera (1925)
Poltergeist (1982)
Psycho (1960)
Repulsion
Ringu
Rosemary's Baby
Scream
Se7en
The Shining
The Texas Chainsaw Massacre (1974)
The Thing (1982)
Videodrome
The Wicker Man (1973)