ObjectLoader: Remove legacy code.

src/loaders/ObjectLoader.js

@@ -31,7 +31,6 @@ import { LineLoop } from '../objects/LineLoop.js';
 import { LineSegments } from '../objects/LineSegments.js';
 import { LOD } from '../objects/LOD.js';
 import { Mesh } from '../objects/Mesh.js';
-import { SkinnedMesh } from '../objects/SkinnedMesh.js';
 import { Shape } from '../extras/core/Shape.js';
 import { Fog } from '../scenes/Fog.js';
 import { FogExp2 } from '../scenes/FogExp2.js';
@@ -827,15 +826,7 @@ ObjectLoader.prototype = Object.assign( Object.create( Loader.prototype ), {
 				var geometry = getGeometry( data.geometry );
 				var material = getMaterial( data.material );
 
-				if ( geometry.bones && geometry.bones.length > 0 ) {
-
-					object = new SkinnedMesh( geometry, material );
-
-				} else {
-
-					object = new Mesh( geometry, material );
-
-				}
+				object = new Mesh( geometry, material );
 
 				break;