chore(OWNERS): guocb is not an owner anymore

Chrome Fleet Software team has cleaned all codes in dev-utils repo.

BUG=b:246599150
TEST=None

Change-Id: Iaf262f4202622e1dcbaa241e8f134fca8e47d852
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/3928516
Auto-Submit: Congbin Guo <guocb@chromium.org>
Tested-by: Congbin Guo <guocb@chromium.org>
Reviewed-by: Allen Li <ayatane@chromium.org>
Commit-Queue: Congbin Guo <guocb@chromium.org>
1 file changed