Switch to system/core/janitors as OWNERS.

Change-Id: Ia4bd86d2f5b554c6c1dbf48e144ddac73dc60d07
diff --git a/OWNERS b/OWNERS
index 76622de..7529cb9 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1,5 +1 @@
-# Default code reviewers picked from top 3 or more developers.
-# Please update this list if you find better candidates.
-enh@google.com
-hhb@google.com
-jdanis@google.com
+include platform/system/core:/janitors/OWNERS