KEP-3629: remove unnecessary comments on beta version in kep.yaml

Author: everpeace

keps/sig-node/3619-supplemental-groups-policy/kep.yaml

@@ -29,10 +29,6 @@ latest-milestone: "v1.31"
 # The milestone at which this feature was, or is targeted to be, at each stage.
 milestone:
   alpha: "v1.31"
-# NOTE: This is tentative milestone.
-#       It is because the beta promotion will wait for containerd v2 got released.
-#       and it will become popular.
-# ref: https://github.com/kubernetes/enhancements/pull/4895#discussion_r1790492414
   beta: "v1.33"
   stable: "v1.yy"