Update owner

Change-Id: I11931bcc51408db3ea8d75db67691ee3eb6e0194
Test: N/A
diff --git a/tools/releasetools/OWNERS b/tools/releasetools/OWNERS
index d0b8627..5827046 100644
--- a/tools/releasetools/OWNERS
+++ b/tools/releasetools/OWNERS
@@ -1,6 +1,5 @@
 elsk@google.com
 nhdo@google.com
-xunchang@google.com
 zhangkelvin@google.com
 
 per-file merge_*.py = danielnorman@google.com