ObjectLoader: Remove usage of LegacyJSONLoader.

src/loaders/ObjectLoader.js

@@ -419,17 +419,7 @@ ObjectLoader.prototype = Object.assign( Object.create( Loader.prototype ), {
 
 					case 'Geometry':
 
-						if ( 'THREE' in window && 'LegacyJSONLoader' in THREE ) {
-
-							var geometryLoader = new THREE.LegacyJSONLoader();
-							geometry = geometryLoader.parse( data, this.resourcePath ).geometry;
-
-
-						} else {
-
-							console.error( 'THREE.ObjectLoader: You have to import LegacyJSONLoader in order load geometry data of type "Geometry".' );
-
-						}
+						console.error( 'THREE.ObjectLoader: Loading "Geometry" is not supported anymore.' );
 
 						break;