Removing items on gorund

Hello I was just messing around when I mentioned that the items that are in my arraylist are not removing when i call my remove method I altready tried to loop through all the items and set them to null but that did not work can someone help me with remeving these itemstacks of the ground

Code (Text):

private ArrayList<ItemStack> items = new ArrayList<ItemStack>();

        public void setUp() {
        final Location location = arena.getEggWave();
        final Random random = new Random();
        anInt = timer;
        eggTask = Bukkit.getScheduler().runTaskTimer(Farm.getPlugin(), new Runnable() {
            @Override
            public void run() {
                if(!(anInt >= 10)) {
                    anInt++;
                    int a = (int) location.getX();
                    int z = (int) location.getZ();
                    int aa = random.nextInt(10) + a;
                    int zz = random.nextInt(10) + z;
                    Location eggloc = new Location(location.getWorld(), aa, location.getY(), zz);
                    ItemStack egg = new ItemStack(Material.EGG);
                    ItemMeta meta = egg.getItemMeta();
                    meta.setDisplayName("" + anInt);
                    egg.setItemMeta(meta);
                    Item i = location.getWorld().dropItem(eggloc, egg);
                    i.setPickupDelay(40);
                    i.setVelocity(location.getDirection().setX(0).setZ(0).setY(0));
                } else {
                    endEggTask();
                }
            }
        },0L ,20L);

    }

    public void endEggTask() {
        for(ItemStack item : items) {
            if(item != null) {
                item = null;
            }
        }
        eggTask.cancel();
    }

Sorry for bad english