Handle additional cleanups from prior PR
Handle additional cleanups from prior PR

Update comment and streamline getting the default platform spec

Signed-off-by: Phil Estes <dbac1f450dc8326caa7ba104b384a0eca642250c@linux.vnet.ibm.com>

crosbymichael/containerd,vdemeester/containerd,estesp/containerd,containerd/containerd,thaJeztah/containerd,dmcgowan/containerd,estesp/containerd,vdemeester/containerd,thaJeztah/containerd,mikebrow/containerd,mikebrow/containerd,containerd/containerd,crosbymichael/containerd,dmcgowan/containerd