skipper: revert "Configure dependabot for skipper"

This reverts commit b9216ca. (#7022)

Signed-off-by: Alexander Yastrebov <[email protected]>

Author: AlexanderYastrebov

.github/dependabot.yml

@@ -1,4 +1,5 @@
 # {{ if eq .Cluster.ConfigItems.skipper_oauth2_ui_login "true" }}
+# {{ $version := "main-11" }}
 apiVersion: v1
 kind: ServiceAccount
 metadata:
@@ -85,7 +86,7 @@ spec:
           restartPolicy: Never
           containers:
             - name: controller
-              image: "container-registry.zalando.net/gwproxy/hostname-credentials-controller:main-11"
+              image: "container-registry.zalando.net/gwproxy/hostname-credentials-controller:{{ $version }}"
               terminationMessagePolicy: FallbackToLogsOnError
               args:
                 - -ingress-selector=application

cluster/manifests/skipper/hostname-credentials-controller.yaml

@@ -1,4 +1,5 @@
 # {{ if eq .Cluster.ConfigItems.skipper_oauth2_ui_login "true" }}
+# {{ $version := "main-5" }}
 apiVersion: v1
 kind: ServiceAccount
 metadata:
@@ -72,7 +73,7 @@ spec:
           restartPolicy: Never
           containers:
             - name: combiner
-              image: "container-registry.zalando.net/gwproxy/secret-combiner:main-5"
+              image: "container-registry.zalando.net/gwproxy/secret-combiner:{{ $version }}"
               terminationMessagePolicy: FallbackToLogsOnError
               env:
                 - name: NAMESPACE