Silent warnings and non-changes.

hosts/all.yaml

@@ -17,3 +17,7 @@ all:
   vars:
     # Force usage of Python3.
     ansible_python_interpreter: python3
+  children:
+    pkg_mgr_apt:
+    pkg_mgr_opkg:
+    pkg_mgr_openbsd_pkg:

update.yaml

@@ -6,6 +6,7 @@
     - name: Group hosts by package manager
       group_by:
         key: pkg_mgr_{{ ansible_pkg_mgr }}
+      changed_when: false
       tags:
         - always