Revert "spanification: Enable -WUnsafe-buffer-usage to more dirs [3/7]"

This reverts commit 843c2aed6857c9ec2c26452fbe3cc9bc3d495020.

Reason for revert: https://ci.chromium.org/ui/p/chrome/builders/ci/win64-chrome compile failure.

First failure:
https://ci.chromium.org/ui/p/chrome/builders/ci/win64-chrome/30335/overview

Original change's description:
> spanification: Enable -WUnsafe-buffer-usage to more dirs [3/7]
>
> Failing files have been excluded by:
> https://chromium-review.googlesource.com/c/chromium/src/+/6067126
>
> See internal doc about it:
> https://docs.google.com/document/d/1erdcokeh6rfBqs_h0drHqSLtbDbB61j7j3O2Pz8NH78/edit?resourcekey=0-hNe6w1hYAYyVXGEpWI7HVA&tab=t.0
>
> Cq-Include-Trybots: luci.chrome.try:win-chrome
> Cq-Include-Trybots: luci.chrome.try:win64-chrome
> Cq-Include-Trybots: luci.chromium.try:android-arm64-rel
> Cq-Include-Trybots: luci.chromium.try:android-cronet-arm64-rel
> Cq-Include-Trybots: luci.chromium.try:chromeos-arm-generic-rel
> Cq-Include-Trybots: luci.chromium.try:chromeos-libfuzzer-asan-rel
> Cq-Include-Trybots: luci.chromium.try:linux-asan-rel
> Cq-Include-Trybots: luci.chromium.try:linux-cast-arm-rel
> Cq-Include-Trybots: luci.chromium.try:linux-libfuzzer-asan-rel
> Cq-Include-Trybots: luci.chromium.try:win-libfuzzer-asan-rel
>
> Bug: 40285824
> Change-Id: Id1e5d849e1990085a8cf725a936fe028794bb853
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6110755
> Reviewed-by: Tom Sepez <tsepez@chromium.org>
> Commit-Queue: Arthur Sonzogni <arthursonzogni@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1399839}

Bug: 40285824
Change-Id: I728daf206770471910b85cb20872c287ab2f515c
Cq-Include-Trybots: luci.chrome.try:win-chrome
Cq-Include-Trybots: luci.chrome.try:win64-chrome
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No-Presubmit: true
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Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6115182
Auto-Submit: Owen Min <zmin@chromium.org>
Owners-Override: Owen Min <zmin@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#1399857}