layers: Remove redundant CV checks
layers: Remove redundant CV checks

These CreateGraphicsPipeline checks are covered in
parameter_validation.

Change-Id: I4c273aa2cd88791d2f6cfa7a5b6c48e629706a85

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