layers: Remove helper routine dead parameters
layers: Remove helper routine dead parameters

Change-Id: I9fa9456cd228dd3636002c5f59e60d7f7e1909fa

KhronosGroup/Vulkan-LoaderAndValidationLayers,KhronosGroup/Vulkan-LoaderAndValidationLayers,KhronosGroup/Vulkan-LoaderAndValidationLayers,KhronosGroup/Vulkan-LoaderAndValidationLayers