Don't check header guards in cpplint.py
Don't check header guards in cpplint.py

Header guards are checked by CheckForIncludeGuards which has broader
coverage than cpplint.py and should therefore be preferred.

Having two include-guard checkers that cover different sets of files and
use different tags to silence warnings is just confusing.

Bug: 1309977
Change-Id: Ic0d1ad610cf9c34d6777d852da2e2e22b8686552
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/3587725
Reviewed-by: Peter Kasting <af2833f195af96c34185f741f3f4394197a8590f@chromium.org>
Commit-Queue: Bruce Dawson <fe9e26f3989304bf7275ed139c57fd059c63d22d@chromium.org>

CoherentLabs/depot_tools,CoherentLabs/depot_tools