Code review and modify for docs

Signed-off-by: SiqiLuo <1587295470@qq.com>

docs/contributing/organization_structure.md

@@ -1,22 +0,0 @@
-Following the [KubeEdge Community Membership](https://github.com/kubeedge/community/blob/master/community-membership.md#member), we propose the membership arrangement for Kubeedge SIG AI.
-
-# Kubeedge SIG AI Membership
-| Role | Member List |
-| ----- | ------------------ |
-| Contributors | [Contributor List](https://github.com/kubeedge/sedna/graphs/contributors) |
-| Members | 
-| Reviewers | [jaypume](https://github.com/jaypume) <br> [Poorunga](https://github.com/Poorunga) <br> [JimmyYang20](https://github.com/JimmyYang20) <br> [TymonXie](https://github.com/TymonXie) <br> [llhuii](https://github.com/llhuii) <br> [JoeyHwong-gk](https://github.com/JoeyHwong-gk)|
-| Approvers | None|
-| Maintainers | None |
-| Owners | None |
-
-
-# Kubeedge SIG AI Owners of Features
-|  | Features | Owners | Other collaborative members
-| ---- |----- | ------------------ | ------- |
-| Sedna | AI Framework | [jaypume](https://github.com/jaypume) |[JoeyHwong-gk](https://github.com/JoeyHwong-gk) |
-| | Joint inference | [jaypume](https://github.com/jaypume) | |
-| | Incremental training | [jaypume](https://github.com/jaypume) | |
-| | Federated learning | [jaypume](https://github.com/jaypume) | |
-| | Lifelong learning | [MooreZheng](https://github.com/MooreZheng) | [luosiqi](https://github.com/luosiqi)|
-