update_engine: update OWNERS

BUG=None
TEST=None

Change-Id: Iec84f90a345feaaaa225beaec1e09b7c409b3e51
Reviewed-on: https://chromium-review.googlesource.com/c/aosp/platform/system/update_engine/+/1810872
Reviewed-by: Amin Hassani <ahassani@chromium.org>
Tested-by: Ben Chan <benchan@chromium.org>
diff --git a/OWNERS b/OWNERS
index aa858bb..75fd9f1 100644
--- a/OWNERS
+++ b/OWNERS
@@ -5,7 +5,6 @@
 senj@google.com
 
 # Chromium OS maintainers:
-benchan@google.com
 ahassani@google.com
 kimjae@google.com