layers: Remove buffer image_xfer_granularity checks
layers: Remove buffer image_xfer_granularity checks

These checks are obsolete and have been removed from the spec.

Change-Id: If0c47096029775c53493ba2a5b3d3ee58211f4b3

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