Remove triangulate function from typing

Function has already been removed from the codebase and is not part of the public API.

src/extras/ShapeUtils.d.ts

@@ -5,7 +5,6 @@ interface Vec2 {
 
 export namespace ShapeUtils {
 	export function area( contour: Vec2[] ): number;
-	export function triangulate( contour: Vec2[], indices: boolean ): number[];
 	export function triangulateShape( contour: Vec2[], holes: Vec2[] ): number[][];
 	export function isClockWise( pts: Vec2[] ): boolean;
 }