Unused helper function

I'm still new at Vulkan and followed the tutorial until multisampling. During deph buffering chapter we create a helper function:

bool hasStencilComponent(VkFormat format) {
return format == VK_FORMAT_D32_SFLOAT_S8_UINT || format == VK_FORMAT_D24_UNORM_S8_UINT;
}

But in the source code, it's not used anywhere.