##### SUMMARY
helpers contains call to Display.deprecated or AnsibleModule.deprecate and is scheduled for removal

```
lib/ansible/playbook/helpers.py:158:20: ansible-deprecated-version: Deprecated version ('2.12') found in call to Display.deprecated or AnsibleModule.deprecate (0%)
lib/ansible/playbook/helpers.py:255:24: ansible-deprecated-version: Deprecated version ('2.12') found in call to Display.deprecated or AnsibleModule.deprecate (0%)
lib/ansible/playbook/helpers.py:298:24: ansible-deprecated-version: Deprecated version ('2.12') found in call to Display.deprecated or AnsibleModule.deprecate (0%)
lib/ansible/playbook/helpers.py:336:20: ansible-deprecated-version: Deprecated version ('2.12') found in call to Display.deprecated or AnsibleModule.deprecate (0%)
```

##### ISSUE TYPE
 - Bug Report

##### COMPONENT NAME
```
lib/ansible/playbook/helpers.py
```

##### ANSIBLE VERSION
```
2.12
```

##### CONFIGURATION
N/A

##### OS / ENVIRONMENT
N/A

##### STEPS TO REPRODUCE
N/A

##### EXPECTED RESULTS
N/A

##### ACTUAL RESULTS
N/A

if host not in self._hosts:
            self._hosts.append(host)
            return
        raise ValueError()
    def __eq__(self, other):
        return (other._filename == self._filename and
                other._args == self._args and
                other._vars == self._vars and
                other._task._uuid == self._task._uuid and
                other._task._parent._uuid == self._task._parent._uuid)
    def __repr__(self):
        return "%s (args=%s vars=%s): %s" % (self._filename, self._args, self._vars, self._hosts)
    @staticmethod
    def process_include_results(results, iterator, loader, variable_manager):
        included_files = []
        task_vars_cache = {}
        for res in results:
            original_host = res._host
            original_task = res._task
            if original_task.action in C._ACTION_ALL_INCLUDES:
                if original_task.action in C._ACTION_INCLUDE:
                    display.deprecated('"include" is deprecated, use include_tasks/import_tasks/import_playbook instead', "2.16")
                if original_task.loop:
                    if 'results' not in res._result:
                        continue
                    include_results = res._result['results']
                else:
                    include_results = [res._result]
                for include_result in include_results: