go.mod: remove version tag
go.mod: remove version tag

It was added by make deps-update, but it's better to keep it out to simplify
downstreaming.

Signed-off-by: Ihar Hrachyshka <b339079bdd0c511d3934e046f7b02c5281dc2db1@redhat.com>

davidvossel/kubevirt,kubevirt/kubevirt,kubevirt/kubevirt,stu-gott/kubevirt,kubevirt/kubevirt,davidvossel/kubevirt,stu-gott/kubevirt,davidvossel/kubevirt,stu-gott/kubevirt,kubevirt/kubevirt,davidvossel/kubevirt,stu-gott/kubevirt