Revert "Opt out of C++23 when building in Chromium"

This reverts commit 4a28587a27bd715de0703b83cedfeeb22af130ff.

Reason for revert: Skia should keep C++23 bot coverage

Original change's description:
> Opt out of C++23 when building in Chromium
>
> See https://groups.google.com/a/google.com/g/chromium-dev-internal/c/22inHeL2Di8/m/P929_yUSEgAJ
> for the announcement. Some of Skia's clients are C++20 only (e.g.
> GCC 10.x support) for now.
>
> Change-Id: I0f857e5575d042daef8a7e1a262934d18ee65f7d
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/1140758
> Reviewed-by: Ben Wagner <bungeman@google.com>
> Commit-Queue: Kaylee Lubick <kjlubick@google.com>
> Auto-Submit: Kaylee Lubick <kjlubick@google.com>
> Commit-Queue: Ben Wagner <bungeman@google.com>

No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Change-Id: I3234fc7ce6af950e09e7adfffd4a0c21aba9e626
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/1141216
Commit-Queue: Kaylee Lubick <kjlubick@google.com>
Auto-Submit: Victor Vianna <victorvianna@google.com>
Reviewed-by: Kaylee Lubick <kjlubick@google.com>