Github user asfgit closed the pull request at:
https://github.com/apache/libcloud/pull/816
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GitHub user net613 opened a pull request:
https://github.com/apache/libcloud/pull/816
Aliyun ecs: Add support for deleting security group
## Changes Title (replace this with a logical title for your changes)
### Description
Currently for Aliyun ECS, you cannot
