cronet: remove myself from OWNERS

Cronet has a number of other committer owners now.

Change-Id: I7adab2d30b1dd5eeff24f1918c9d075d00e93ab5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5424911


Reviewed-by: Stefano Duo <stefanoduo@google.com>
Commit-Queue: Richard (Torne) Coles <torne@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1283250}