IO Windows remove unused wait group
IO Windows remove unused wait group

Removes an unused and unneeded wait group.

Signed-off-by: Justin Terry (VM) <f0c38945ef01caad6a7c3d4b90a29703264b34a4@microsoft.com>

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