Remove eugenebut from ios/chrome/browser/crash_report/breadcrumbs owners

Bug: None
Change-Id: Ided81f2161892875e6af8b2d897dedc1ba2bb1e3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2633977
Auto-Submit: Eugene But <eugenebut@chromium.org>
Commit-Queue: Mike Dougherty <michaeldo@chromium.org>
Reviewed-by: Mike Dougherty <michaeldo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#844429}

ios/chrome/browser/crash_report/breadcrumbs/OWNERS

-eugenebut@chromium.org
 michaeldo@chromium.org