///removeChild(parent, child)
/**
 * removeChild :: TreeNode -> TreeNode -> ()
 * 
 * Removes `child` from the list of children in `parent` and sets the parent of the `child` to noone.
 *
 * @param parent the parent TreeNode
 * @param child the child TreeNode
 */

ds_list_delete(argument0.children, ds_list_find_index(argument0.children, argument1));
argument1.parent = noone;