Remove asully@ as owner for various things

It doesn't seem he's working on Chromium anymore.

The histogram ownership change is from the following CL that failed to land:
https://chromium-review.googlesource.com/c/chromium/src/+/7018169

Change-Id: I94f35d5f6fb3b51a533fd0438b2c1212ff0d664b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7276329
Reviewed-by: Christian Biesinger <cbiesinger@chromium.org>
Reviewed-by: Rakina Zata Amni <rakina@chromium.org>
Commit-Queue: Andrew Williams <awillia@chromium.org>
Owners-Override: Andrew Williams <awillia@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1561693}
NOKEYCHECK=True
GitOrigin-RevId: 67508848f06ff92ade6a693c0e8401884ef2d62b