remove ansible_check_mode variable breaking old ansible versions

playbook/roles/upgrader/tasks/main.yml

@@ -43,7 +43,6 @@
 
   - name: Update playbook md5
     shell: echo {{ archive.stat.md5 }} > /opt/upgrader/next-upgrade-signature
-    when: not ansible_check_mode
 
   - name: Stat Current Upgrade Signature
     file: path=/opt/upgrader/current-upgrade-signature state=touch mode="0666"
@@ -60,7 +59,7 @@
 
   - name: Do upgrade
     shell: ansible-playbook {{ upgrader_playbook }} -i hosts 2>>/opt/upgrader/latest_upgrade.log  >> /opt/upgrader/latest_upgrade.log
-    when: not ansible_check_mode and (upgrade_after > lookup('file', '/opt/upgrader/last-upgrade')|int ) and (lookup('file', '/opt/upgrader/next-upgrade-signature') != lookup('file', '/opt/upgrader/current-upgrade-signature'))
+    when: (upgrade_after > lookup('file', '/opt/upgrader/last-upgrade')|int ) and (lookup('file', '/opt/upgrader/next-upgrade-signature') != lookup('file', '/opt/upgrader/current-upgrade-signature'))
     args:
       chdir: /opt/upgrader/playbook-tmp/
 
@@ -73,9 +72,9 @@
 
   - name: Upgrade Current Upgrade Signature
     shell: cat /opt/upgrader/next-upgrade-signature > /opt/upgrader/current-upgrade-signature
-    when: not ansible_check_mode and (upgrade_after > lookup('file', '/opt/upgrader/last-upgrade')|int ) and (lookup('file', '/opt/upgrader/next-upgrade-signature') != lookup('file', '/opt/upgrader/current-upgrade-signature'))
+    when: (upgrade_after > lookup('file', '/opt/upgrader/last-upgrade')|int ) and (lookup('file', '/opt/upgrader/next-upgrade-signature') != lookup('file', '/opt/upgrader/current-upgrade-signature'))
 
   - shell: echo {{ ansible_date_time.epoch }} > /opt/upgrader/last-upgrade
-    when: not ansible_check_mode and (upgrade_after > lookup('file', '/opt/upgrader/last-upgrade')|int )
+    when: (upgrade_after > lookup('file', '/opt/upgrader/last-upgrade')|int )
 
   - include: remove-legacy.yml