The parameters 'template' and 'template_url' are incorrectly required in all cases.

If the state is 'absent' they should not be required. A few lines below the correct check is already in place.

lib/ansible/modules/cloud/amazon/cloudformation.py

@@ -268,9 +268,6 @@ def main():
     if not HAS_BOTO:
         module.fail_json(msg='boto required for this module')
 
-    if module.params['template'] is None and module.params['template_url'] is None:
-        module.fail_json(msg='Either template or template_url expected')
-
     state = module.params['state']
     stack_name = module.params['stack_name']