[TEAM] yzhliu -> committer (#1509)

CONTRIBUTORS.md

@@ -6,16 +6,16 @@ contribute to, and influence the direction of the project. We actively invite co
 See the [community structure document](http://docs.tvm.ai/contribute/community.html) for the explanation of community structure and contribution guidelines.
 
 ## Committers
-- [Tianqi Chen](https://github.com/tqchen) (PMC), University of Washington
-- [Thierry Moreau](http://homes.cs.washington.edu/~moreau/), University of Washington
-- [Ziheng Jiang](https://github.com/ZihengJiang), Fudan University
-- [Haichen Shen](http://homes.cs.washington.edu/~haichen/), University of Washington
+- [Tianqi Chen](https://github.com/tqchen) (PMC)
+- [Thierry Moreau](http://homes.cs.washington.edu/~moreau/)
+- [Ziheng Jiang](https://github.com/ZihengJiang)
+- [Haichen Shen](http://homes.cs.washington.edu/~haichen/)
+- [Yizhi Liu](https://github.com/yzhliu)
 
 ## Code Owners
 - [Aditya Atluri](https://github.com/adityaatluri) ROCM
 - [Leyuan Wang](https://github.com/Laurawly) TOPI
 - [Yuwei Hu](https://github.com/Huyuwei) TOPI
-- [Yizhi Liu](https://github.com/yzhliu) JVM package
 - [Zhixun Tan](https://github.com/phisiart) OpenGL/WebGL backend
 - [Nick Hynes](https://github.com/nhynes) SGX and secured computing