Merge pull request #16832 from zacaj/patch-1

remove unused BoundingBoxHelper type definition

src/helpers/BoxHelper.d.ts

@@ -2,18 +2,6 @@ import { Object3D } from './../core/Object3D';
 import { Color } from './../math/Color';
 import { LineSegments } from './../objects/LineSegments';
 
-/**
- * @deprecated Use {@link BoxHelper THREE.BoxHelper} instead.
- */
-// export class BoundingBoxHelper extends Mesh {
-//	 constructor(object?: Object3D, hex?: number);
-
-//	 object: Object3D;
-//	 box: Box3;
-
-//	 update(): void;
-// }
-
 export class BoxHelper extends LineSegments {
 
 	constructor( object?: Object3D, color?: Color );