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

```
lib/ansible/modules/source_control/gitlab_group.py:273:4: ansible-deprecated-version: Deprecated version ('2.10') found in call to Display.deprecated or AnsibleModule.deprecate
```

##### ISSUE TYPE
 - Bug Report

##### COMPONENT NAME
```
lib/ansible/modules/source_control/gitlab_group.py
```

##### ANSIBLE VERSION
```
2.10
```

##### CONFIGURATION
N/A

##### OS / ENVIRONMENT
N/A

##### STEPS TO REPRODUCE
N/A

##### EXPECTED RESULTS
N/A

##### ACTUAL RESULTS
N/A

deployKey = self.findDeployKey(project, key_title)
        if deployKey:
            self.deployKeyObject = deployKey
            return True
        return False
    def deleteDeployKey(self):
        if self._module.check_mode:
            return True
        return self.deployKeyObject.delete()
def deprecation_warning(module):
    deprecated_aliases = ['private_token', 'access_token']
    for aliase in deprecated_aliases:
        if aliase in module.params:
            module.deprecate("Alias \'{aliase}\' is deprecated".format(aliase=aliase), "2.10")
def main():
    argument_spec = basic_auth_argument_spec()
    argument_spec.update(dict(
        api_token=dict(type='str', no_log=True, aliases=["private_token", "access_token"]),
        state=dict(type='str', default="present", choices=["absent", "present"]),
        project=dict(type='str', required=True),
        key=dict(type='str', required=True),