🔥 Remove obsolete role dehydrated-cron

We replaced this with penguineer.dehydrated_cron.

roles/dehydrated-cron/defaults/main.yml

@@ -1,4 +0,0 @@
----
-dehydrated_cron_minute: "0"
-dehydrated_cron_hour: "3"
-dehydrated_cron_day: "*/5"

roles/dehydrated-cron/meta/main.yml

@@ -1,3 +0,0 @@
----
-dependencies:
-- role: ansible-role-dehydrated

roles/dehydrated-cron/tasks/main.yml

@@ -1,8 +0,0 @@
----
-- name: Install dehydrated cron job.
-  cron:
-    name: renew dehydrated certs
-    hour: "{{ dehydrated_cron_hour }}"
-    minute: "{{ dehydrated_cron_minute }}"
-    day: "{{ dehydrated_cron_day }}"
-    job: "{{ dehydrated_binary }} -c -g"