Update OWNERS

jmgao@ and tomcherry@ are no longer on the team.

Test: n/a
Change-Id: Iba6a27d02a7a14571191ddae4e90aa0a0478f35a
diff --git a/OWNERS b/OWNERS
index 97777f7..682a067 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1,3 +1 @@
 enh@google.com
-jmgao@google.com
-tomcherry@google.com