Revert "Enable raw_ref check on linux"

This reverts commit d1ff03b57f992b7e856aa247598385a2a5f4ee09.

Reason for revert:
LUCI Bisection identified this CL as the culprit of a build failure. See the analysis: https://luci-bisection.appspot.com/analysis/b/8779099808784458801

Sample failed build: https://ci.chromium.org/b/8779099808784458801

If this is a false positive, please report it at https://bugs.chromium.org/p/chromium/issues/entry?comment=Analysis%3A+https%3A%2F%2Fluci-bisection.appspot.com%2Fanalysis%2Fb%2F8779099808784458801&components=Tools%3ETest%3EFindit&labels=LUCI-Bisection-Wrong%2CPri-3%2CType-Bug&status=Available&summary=Wrongly+blamed+https%3A%2F%2Fchromium-review.googlesource.com%2Fc%2Fchromium%2Fsrc%2F%2B%2F4534995

Original change's description:
> Enable raw_ref check on linux
>
> clang will now show warnings where raw_ref<T> could be used.
>
> Change-Id: I2c88bbe23cef7431f3d5ede46e9a661e4ad89e5a
> Bug: 1446146
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4534995
> Reviewed-by: Daniel Cheng <dcheng@chromium.org>
> Reviewed-by: Takuto Ikuta <tikuta@chromium.org>
> Commit-Queue: Ali Hijazi <ahijazi@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1153404}
>

Bug: 1446146
Change-Id: I078e61c0edb85a8e6033ae4fae062bdef75d820d
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4591034
Bot-Commit: luci-bisection@appspot.gserviceaccount.com <luci-bisection@appspot.gserviceaccount.com>
Owners-Override: luci-bisection@appspot.gserviceaccount.com <luci-bisection@appspot.gserviceaccount.com>
Commit-Queue: luci-bisection@appspot.gserviceaccount.com <luci-bisection@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#1153439}