[three.js] Remove unresolvable authors
[three.js] Remove unresolvable authors

@SereznoKot, @s093294, and @elk941 are usernames that longer exist on Github.
mcliment/DefinitelyTyped,georgemarshall/DefinitelyTyped,georgemarshall/DefinitelyTyped,borisyankov/DefinitelyTyped,georgemarshall/DefinitelyTyped,markogresak/DefinitelyTyped,georgemarshall/DefinitelyTyped,dsebastien/DefinitelyTyped,borisyankov/DefinitelyTyped,dsebastien/DefinitelyTyped