Remove OWNERS who have moved on

Test: TreeHugger
Change-Id: I795d09f585885a30b01feea4a722c2a41797d6ae
diff --git a/OWNERS b/OWNERS
index 6fdb550..b1c1fea 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1,11 +1,7 @@
-alanstokes@google.com
 drysdale@google.com
-eranm@google.com
 hasinitg@google.com
 jbires@google.com
 jeffv@google.com
-kroot@google.com
 sethmo@google.com
 swillden@google.com
-trong@google.com
 zeuthen@google.com