public static void removeItem(EntityPlayer player, ItemStack is, int amount) {
		if(is == null)
			return;

		int removed = 0;

		for(ItemStack stack : player.inventory.mainInventory) {
			if(stack != null && removed <= is.stackSize) {
				if(areItemStacksEqual(stack, is)) {
					stack.stackSize--;
					removed++;
				}
			}
		}
	}