layers: Remove redundant CV ClearAttachments check
layers: Remove redundant CV ClearAttachments check

This check was incorrectly labeled, and the actual check is present
in the image layer.

Change-Id: I29b866eb9da731e0996b95da3052b4878e906602

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