Retire maintainers

Yang Feng and Yuanmao Zhu has been contributed to the project as
maintainers, and now they are not active due to other issues. So we move
them to retired maintainers.

Thanks for all their contributions!

Signed-off-by: Baohua Yang <[email protected]>

Author: yeasy

MAINTAINERS.md

@@ -3,16 +3,13 @@
 | Name | GitHub | Email |
 |---|---|---|
 | Baohua Yang | yeasy | [email protected] |
-| Yang Feng | fengyangsy | [email protected] |
-| Yuanmao Zhu | zhuyuanmao | [email protected] |
 | Xichen Pan | xichen1 | [email protected]  |
 | Haibo Yang | YoungHypo | [email protected]  |
 
 ## Release Managers
 
 | Name | GitHub | Email |
 |---|---|---|
-| Yang Feng | fengyangsy | [email protected] |
 
 ## Retired Maintainers
 
@@ -22,5 +19,7 @@
 | Tong Li | tongli | [email protected] |
 | Haitao Yue | hightall | [email protected] |
 | Qiang Xu | XuHugo | [email protected] |
+| Yang Feng | fengyangsy | [email protected] |
+| Yuanmao Zhu | zhuyuanmao | [email protected] |
 
 <a rel="license" href="http://creativecommons.org/licenses/by/4.0/"><img alt="Creative Commons License" style="border-width:0" src="https://i.creativecommons.org/l/by/4.0/88x31.png" /></a><br />This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution 4.0 International License</a>.