vpn-manager: Update OWNERS file.

BUG=None
TEST=None

Change-Id: I769050e7739b000160c7eef697c786545baf1cd3
Reviewed-on: https://chromium-review.googlesource.com/191924
Reviewed-by: Paul Stewart <pstew@chromium.org>
Commit-Queue: Ben Chan <benchan@chromium.org>
Tested-by: Ben Chan <benchan@chromium.org>
diff --git a/OWNERS b/OWNERS
index f8ebe14..9a5b155 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1,2 +1,3 @@
+set noparent
 benchan@chromium.org
-kmixter@chromium.org
+pstew@chromium.org