Remove myself from owners

R=iannucci@chromium.org, nodir@chromium.org

Change-Id: I5eb3b3732610139e04da07129f89b646e0cf60b3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1962930
Auto-Submit: Sergiy Belozorov <sergiyb@chromium.org>
Reviewed-by: Robbie Iannucci <iannucci@chromium.org>
Commit-Queue: Robbie Iannucci <iannucci@chromium.org>

infra/config/OWNERS

 set noparent
 iannucci@chromium.org
 nodir@chromium.org
-sergiyb@chromium.org
 
 per-file recipes.cfg=martiniss@chromium.org
 per-file recipes.cfg=recipe-roller@chromium.org