Remove hard-coded externaldns image versions

Related story: https://mirantis.jira.com/browse/PROD-22456

Change-Id: I7a0eb61cfc85ac71adc287bb9ee33e8c47cf9e97
diff --git a/classes/cluster_deprecated/virtual-mcp11-k8s-calico-dyn/kubernetes/init.yml b/classes/cluster_deprecated/virtual-mcp11-k8s-calico-dyn/kubernetes/init.yml
index 837c174..547bd22 100644
--- a/classes/cluster_deprecated/virtual-mcp11-k8s-calico-dyn/kubernetes/init.yml
+++ b/classes/cluster_deprecated/virtual-mcp11-k8s-calico-dyn/kubernetes/init.yml
@@ -28,7 +28,7 @@
     kubernetes_netchecker_agent_image: mirantis/k8s-netchecker-agent:v1.1.2
     kubernetes_netchecker_server_image: mirantis/k8s-netchecker-server:v1.1.2
     kubernetes_netchecker_agent_probeurls: "http://ipinfo.io"
-    kubernetes_externaldns_image: mirantis/external-dns:latest
+
     kubernetes_externaldns_provider: coredns
     kubernetes_metallb_addresses_pool: 172.16.10.60-172.16.10.80