[buildtools] Remove unrar exception from checkdeps/cpp_checker

Since the offending characters have been removed from unrar sources,
this exception is no longer relevant and can be removed.

Fixed: 458409084
Change-Id: Ibb9b67416ebb74387620ddfd6af7e5d27bfc2463
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7180940
Reviewed-by: Daniel Rubery <[email protected]>
Commit-Queue: Nico Weber <[email protected]>
Reviewed-by: Nico Weber <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1548454}
NOKEYCHECK=True
GitOrigin-RevId: d9afc9227bb52a586c7719a85a241664405942d4
1 file changed