Remove ghartman@ from OWNERS am: 808f7d45c8 am: a110409d10 am: 55e81ab18e

Change-Id: I3bc19fd3e32c93bcaa2a8530c3c29d7db85b9247
diff --git a/OWNERS b/OWNERS
index 1b181d9..e24efbb 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1,4 +1,4 @@
 # Default code reviewers picked from top 3 or more developers.
 # Please update this list if you find better candidates.
-astrachan@google.com
-ghartman@google.com
+adelva@google.com
+natsu@google.com