Revert "Promote coredns to v1.13.1 and v1.13.0"

Author: pacoxu

registry.k8s.io/images/k8s-staging-coredns/images.yaml

@@ -23,5 +23,3 @@
     "sha256:af8c8d35a5d184b386c4a6d1a012c8b218d40d1376474c7d071bb6c07201f47d": ["v1.12.2"]
     "sha256:1391544c978029fcddc65068f6ad67f396e55585b664ecccd7fefba029b9b706": ["v1.12.3"]
     "sha256:986f04c2e15e147d00bdd51e8c51bcef3644b13ff806be7d2ff1b261d6dfbae1": ["v1.12.4"]
-    "sha256:da282c1983a1a330240e6e84eaec9b6120b0de0e7e29e92c44a6acd25f9e0238": ["v1.13.0"]
-    "sha256:9b9128672209474da07c91439bf15ed704ae05ad918dd6454e5b6ae14e35fee6": ["v1.13.1"]