Roles only run on intended supported OS, and minor cleanup of when statements to match

roles/ensure_os_upgrade/tasks/Debian-default.yml

@@ -2,7 +2,6 @@
 # tasks file for ensure_os_upgrade - Debian
 - name: Update sources.list for Debian Upgrade
   when:
-    - ansible_facts["system"] == 'Linux'
     - ansible_facts["os_family"] == 'Debian'
     - ensure_os_upgrade is defined
     - ensure_os_upgrade.target_codename is defined
@@ -14,7 +13,6 @@
 
 - name: Safe Upgrade Debian Packages
   when:
-    - ansible_facts["system"] == 'Linux'
     - ansible_facts["os_family"] == 'Debian'
     - ensure_os_upgrade is defined
     - ensure_os_upgrade.target_codename is defined
@@ -27,7 +25,6 @@
 
 - name: Full Upgrade Debian Packages
   when:
-    - ansible_facts["system"] == 'Linux'
     - ansible_facts["os_family"] == 'Debian'
     - ensure_os_upgrade is defined
     - ensure_os_upgrade.target_codename is defined
@@ -41,7 +38,6 @@
 
 - name: Reboot Debian After Upgrade
   when:
-    - ansible_facts["system"] == 'Linux'
     - ansible_facts["os_family"] == 'Debian'
     - ensure_os_upgrade is defined
     - ensure_os_upgrade.target_codename is defined