tests: Remove second destroy of the same buffer
tests: Remove second destroy of the same buffer

Change-Id: I21a4ee1406cb1f8ede669488df776cee5ea3addc

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