removed duplicate links

docs/modules/tutorials/pages/beginner/hello_picking.adoc

@@ -397,9 +397,3 @@ Use your imagination from here:
 
 *  In your game, the click can trigger any action on the identified Geometry: Detach it and put it into the inventory, attach something to it, trigger an animation or effect, open a door or crate, – etc.
 *  In your game, you could replace the red mark with a particle emitter, add an explosion effect, play a sound, calculate the new score after each hit depending on what was hit – etc.
-
-*See also:*
-
-*  xref:beginner/hello_input_system#.adoc[Hello Input]
-*  xref:ROOT:jme3/advanced/mouse_picking.adoc[Mouse Picking]
-*  xref:ROOT:jme3/advanced/collision_and_intersection.adoc[Collision and Intersection]