Remove debian buster cronjob.

Change-Id: Iac8ce65d4b6f81e7343e489d986632ffd3805bce
diff --git a/k8s/cronjobs.yaml b/k8s/cronjobs.yaml
deleted file mode 100644
index dd1caa9..0000000
--- a/k8s/cronjobs.yaml
+++ /dev/null
@@ -1,27 +0,0 @@
----
-apiVersion: batch/v1beta1
-kind: CronJob
-metadata:
-  name: debian-buster
-spec:
-  schedule: "@midnight"
-  jobTemplate:
-    spec:
-      template:
-        spec:
-          containers:
-            - name: aptly-api
-              image: gcr.io/mendel-linux-cloud-infra/aptly-api:latest
-              imagePullPolicy: Always
-              args:
-                - bash
-                - -c
-                - "/update-mirror.sh debian-buster"
-              volumeMounts:
-                - mountPath: /var/lib/aptly-api
-                  name: aptly-state
-          volumes:
-            - name: aptly-state
-              persistentVolumeClaim:
-                claimName: aptly-state
-          restartPolicy: OnFailure