Revert "layers: Introduce some unique_ptr into pipeline creation"
Revert "layers: Introduce some unique_ptr into pipeline creation"

This reverts commit 7d35703bdc03d94cad272b5ea3ede8d586f57e88.

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