Remove dkrahn and add other maintainers to OWNERS Change-Id: I02f7faa53c6c5b90f2ec73c71a7ff0dd95fe74bd Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/boringssl/+/510426 Reviewed-by: Aaron Green <aarongreen@google.com> Commit-Queue: Aaron Green <aarongreen@google.com>