OWNERS: Remove Andrew, promote Adriana

I'm no-longer employed by IBM, and this repo is tied into the depths of
their platform boot code. It needs to be maintained by someone internal
to IBM.

Change-Id: Ifd1439a3236f875b5a7ff6158c868d7ba783bc38
Signed-off-by: Andrew Jeffery <andrew@codeconstruct.com.au>
diff --git a/OWNERS b/OWNERS
index a740370..ff4b76d 100644
--- a/OWNERS
+++ b/OWNERS
@@ -32,10 +32,9 @@
 # data within them will be kept sorted.
 
 owners:
-- andrew@codeconstruct.com.au
+- anoo@us.ibm.com
 
 reviewers:
-- anoo@us.ibm.com
 - deepak.kodihalli.83@gmail.com
 
 matchers:
@@ -44,9 +43,6 @@
 - name: Adriana Kobylak
   email: anoo@us.ibm.com
   discord: anoo
-- name: Andrew Jeffery
-  email: andrew@codeconstruct.com.au
-  discord: arj
 - name: Deepak Kodihalli
   email: deepak.kodihalli.83@gmail.com
   discord: dkodihal