Revert "Temporarily disable enumeration of VK_KHR_incremental_present"

    const InstanceData& data = GetData(physicalDevice);

    static const std::array<VkExtensionProperties, 2> loader_extensions = {{

        // WSI extensions

#if 0 // Remove this "#if 0" once the VK_KHR_incremental_present extension is ratified

        {VK_KHR_INCREMENTAL_PRESENT_EXTENSION_NAME,

         VK_KHR_INCREMENTAL_PRESENT_SPEC_VERSION},

#endif

        {VK_GOOGLE_DISPLAY_TIMING_EXTENSION_NAME,

         VK_GOOGLE_DISPLAY_TIMING_SPEC_VERSION},

    }};