chore: Clean up release/v1.4 references in master due to EOL (Azure#3884)

* chore: remove release/v1.4 dependabot trigger

* chore: remove clearly defined v1.4 files

* chore: adjust versioning on example and test yamls?

* chore: remove mdnc references

Author: jpayne3506

.github/dependabot.yaml

@@ -193,50 +193,3 @@ updates:
       versions: [">=0.30.0"]
     - dependency-name: "k8s.io/kubectl"
       versions: [">=0.30.0"]
-
-
-# Constrain Kubernetes dependencies to compatibility with release/v1.4 branch - v1.25-v1.27
-- package-ecosystem: "gomod"
-  directory: "/"
-  schedule:
-    interval: "daily"
-  commit-message:
-    prefix: "deps"
-  labels: [ "dependencies", "release/1.4" ]
-  open-pull-requests-limit: 10
-  target-branch: "release/v1.4"
-  ignore:
-    - dependency-name: "k8s.io/api"
-      versions: [">=0.27.0"]
-    - dependency-name: "k8s.io/apiextensions-apiserver"
-      versions: [">=0.27.0"]
-    - dependency-name: "k8s.io/apimachinery"
-      versions: [">=0.27.0"]
-    - dependency-name: "k8s.io/client-go"
-      versions: [">=0.27.0"]
-    - dependency-name: "k8s.io/kubelet"
-      versions: [">=0.27.0"]
-    - dependency-name: "k8s.io/kubectl"
-      versions: [">=0.27.0"]
-- package-ecosystem: "gomod"
-  directory: "/azure-ipam"
-  schedule:
-    interval: "daily"
-  commit-message:
-    prefix: "deps"
-  labels: [ "dependencies", "azure-ipam", "release/1.4" ]
-  open-pull-requests-limit: 10
-  target-branch: "release/v1.4"
-  ignore:
-    - dependency-name: "k8s.io/api"
-      versions: [">=0.27.0"]
-    - dependency-name: "k8s.io/apiextensions-apiserver"
-      versions: [">=0.27.0"]
-    - dependency-name: "k8s.io/apimachinery"
-      versions: [">=0.27.0"]
-    - dependency-name: "k8s.io/client-go"
-      versions: [">=0.27.0"]
-    - dependency-name: "k8s.io/kubelet"
-      versions: [">=0.27.0"]
-    - dependency-name: "k8s.io/kubectl"
-      versions: [">=0.27.0"]