OWNERS: drop people no longer working on CrOS

BUG=None
TEST=None

Change-Id: Ib5e4ebc0832ac8e6abac7c4ab1707ed38ce13fe2
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/inputcontrol/+/5518311
Reviewed-by: Sean O'Brien <seobrien@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>

OWNERS

diff --git a/OWNERS b/OWNERS
index 237af7a..d274636 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1,7 +1,3 @@
 seobrien@chromium.org
-adlr@chromium.org
 cywang@chromium.org
-djkurtz@chromium.org
-ellyjones@chromium.org
-josephsih@chromium.org
 sheckylin@chromium.org