LoadingManager example wasn't using LoadingManager (#23236)

- Removed the link

docs/api/en/loaders/managers/LoadingManager.html

@@ -99,7 +99,6 @@
 		<h2>Examples</h2>
 
 		<p>
-			[example:webgl_loader_fbx WebGL / loader / fbx]<br />
 			[example:webgl_loader_obj WebGL / loader / obj]<br />
 			[example:webgl_materials_physical_reflectivity WebGL / materials / physical / reflectivity]<br />
 			[example:webgl_postprocessing_outline WebGL / postprocesing / outline]