layers:Remove unneeded return value
layers:Remove unneeded return value

MarkStoreImagesAndBuffersAsWritten() only updates state and the return
value was a constant false. Update function to remove the return value.

KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools